Vulnerability-Lookup

BDU:2026-09770 (CVE-2026-4873)

Vulnerability from fstec – Published: 2026-07-15 – Updated: 2026-07-15 – View on bdu.fstec.ru Fixed

Title

Уязвимость программного средства для взаимодействия с серверами cURL, связанная с ошибками процедуры подтверждения подлинности сертификата, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Summary

Уязвимость программного средства для взаимодействия с серверами cURL связана с ошибками процедуры подтверждения подлинности сертификата. Эксплуатация уязвимости может позволить нарушителю, действующему удалённо, получить несанкционированный доступ к защищаемой информации

Severity

5.4 (Medium) CVSS 2.0


                      
                        AV:N/AC:H/Au:N/C:C/I:N/A:N

5.9 (Medium) CVSS 3.1


                      
                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Spoofing, Information gathering

Incidents

Being clarified

Remediation

Software update

CWE

CWE-295 - Неправильное подтверждение подлинности сертификата
CWE-319 - Передача секретной информации в виде открытого текста

Aliases

CVE-2026-4873

References

9 references

URL
https://github.com/advisories/GHSA-5fgw-rv54-prjx
http://www.openwall.com/lists/oss-security/2026/04/29/7
https://curl.se/docs/CVE-2026-4873.html
https://curl.se/docs/CVE-2026-4873.json
https://hackerone.com/reports/3621851
https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-4873
https://access.redhat.com/security/cve/cve-2026-4873
https://ubuntu.com/security/CVE-2026-4873
https://security-tracker.debian.org/tracker/CVE-2026-4873

Impacted products

13 products from 6 vendors

Vendors

Red Hat, Inc., ООО «Ред Софт», Canonical Ltd., Сообщество свободного программного обеспечения, Daniel Stenberg

Products

Red Hat Enterprise Linux, JBoss Core Services, РЕД ОС (запись в едином реестре российских программ №3751), Red Hat OpenShift Container Platform, Ubuntu, OpenShift Dev Spaces, Logging subsystem for Red Hat OpenShift, Red Hat Trusted Profile Analyzer, Confidential Compute Attestation, Debian GNU/Linux, Red Hat Enterprise Linux AI, Red Hat Hardened Images, cURL

Versions

6 (Red Hat Enterprise Linux), 7 (Red Hat Enterprise Linux), 8 (Red Hat Enterprise Linux), - (JBoss Core Services), 7.3 (РЕД ОС), 4 (Red Hat OpenShift Container Platform), 22.04 LTS (Ubuntu), 9 (Red Hat Enterprise Linux), - (OpenShift Dev Spaces), - (Logging subsystem for Red Hat OpenShift), 24.04 LTS (Ubuntu), 10 (Red Hat Enterprise Linux), - (Red Hat Trusted Profile Analyzer), - (Confidential Compute Attestation), 13 (Debian GNU/Linux), 8.0 (РЕД ОС), 3 (Red Hat Enterprise Linux AI), - (Red Hat Hardened Images), 26.04 LTS (Ubuntu), от 7.20.0 до 8.19.0 включительно (cURL)

Product types

Operating system, Application software

Platforms

Red Hat, Inc. Red Hat Enterprise Linux 6, Inc. Red Hat Enterprise Linux 7, Inc. Red Hat Enterprise Linux 8, ООО «Ред Софт» РЕД ОС 7.3 (запись в едином реестре российских программ №3751), Canonical Ltd. Ubuntu 22.04 LTS, Inc. Red Hat Enterprise Linux 9, Canonical Ltd. Ubuntu 24.04 LTS, Inc. Red Hat Enterprise Linux 10, Сообщество свободного программного обеспечения Debian GNU/Linux 13, ООО «Ред Софт» РЕД ОС 8.0 (запись в едином реестре российских программ №3751), Inc. Red Hat Enterprise Linux AI 3, Canonical Ltd. Ubuntu 26.04 LTS

Mitigations

Использование рекомендаций: Для cURL: https://curl.se/docs/CVE-2026-4873.html Для Ред ОС: https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-4873 Для программных продуктов Red Hat Inc.: https://access.redhat.com/security/cve/cve-2026-4873 Для Ubuntu: https://ubuntu.com/security/CVE-2026-4873 Для Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2026-4873

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:H/Au:N/C:C/I:N/A:N",
  "CVSS 3.0": "AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Red Hat, Inc., \u041e\u041e\u041e \u00ab\u0420\u0435\u0434 \u0421\u043e\u0444\u0442\u00bb, Canonical Ltd., \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f, Daniel Stenberg",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "6 (Red Hat Enterprise Linux), 7 (Red Hat Enterprise Linux), 8 (Red Hat Enterprise Linux), - (JBoss Core Services), 7.3 (\u0420\u0415\u0414 \u041e\u0421), 4 (Red Hat OpenShift Container Platform), 22.04 LTS (Ubuntu), 9 (Red Hat Enterprise Linux), - (OpenShift Dev Spaces), - (Logging subsystem for Red Hat OpenShift), 24.04 LTS (Ubuntu), 10 (Red Hat Enterprise Linux), - (Red Hat Trusted Profile Analyzer), - (Confidential Compute Attestation), 13 (Debian GNU/Linux), 8.0 (\u0420\u0415\u0414 \u041e\u0421), 3 (Red Hat Enterprise Linux AI), - (Red Hat Hardened Images), 26.04 LTS (Ubuntu), \u043e\u0442 7.20.0 \u0434\u043e 8.19.0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (cURL)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\u0414\u043b\u044f cURL:\nhttps://curl.se/docs/CVE-2026-4873.html\n\n\u0414\u043b\u044f \u0420\u0435\u0434 \u041e\u0421:\nhttps://redos.red-soft.ru/search/?iblock_id=24\u0026q=CVE-2026-4873\n\n\u0414\u043b\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0445 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432 Red Hat Inc.:\nhttps://access.redhat.com/security/cve/cve-2026-4873\n\n\u0414\u043b\u044f Ubuntu:\nhttps://ubuntu.com/security/CVE-2026-4873\n\n\u0414\u043b\u044f Debian GNU/Linux:\nhttps://security-tracker.debian.org/tracker/CVE-2026-4873",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "13.05.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "15.07.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "15.07.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-09770",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-4873",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Red Hat Enterprise Linux, JBoss Core Services, \u0420\u0415\u0414 \u041e\u0421 (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u21163751), Red Hat OpenShift Container Platform, Ubuntu, OpenShift Dev Spaces, Logging subsystem for Red Hat OpenShift, Red Hat Trusted Profile Analyzer, Confidential Compute Attestation, Debian GNU/Linux, Red Hat Enterprise Linux AI, Red Hat Hardened Images, cURL",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Red Hat, Inc. Red Hat Enterprise Linux 6 , Red Hat, Inc. Red Hat Enterprise Linux 7 , Red Hat, Inc. Red Hat Enterprise Linux 8 , \u041e\u041e\u041e \u00ab\u0420\u0435\u0434 \u0421\u043e\u0444\u0442\u00bb \u0420\u0415\u0414 \u041e\u0421 7.3  (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u21163751), Canonical Ltd. Ubuntu 22.04 LTS , Red Hat, Inc. Red Hat Enterprise Linux 9 , Canonical Ltd. Ubuntu 24.04 LTS , Red Hat, Inc. Red Hat Enterprise Linux 10 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 13 , \u041e\u041e\u041e \u00ab\u0420\u0435\u0434 \u0421\u043e\u0444\u0442\u00bb \u0420\u0415\u0414 \u041e\u0421 8.0  (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u21163751), Red Hat, Inc. Red Hat Enterprise Linux AI 3 , Canonical Ltd. Ubuntu 26.04 LTS ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441 \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c\u0438 cURL, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u043b\u0438\u043d\u043d\u043e\u0441\u0442\u0438 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043d\u0435\u0441\u0430\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0435 \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0438\u0435 \u043f\u043e\u0434\u043b\u0438\u043d\u043d\u043e\u0441\u0442\u0438 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430 (CWE-295), \u041f\u0435\u0440\u0435\u0434\u0430\u0447\u0430 \u0441\u0435\u043a\u0440\u0435\u0442\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u0432\u0438\u0434\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0433\u043e \u0442\u0435\u043a\u0441\u0442\u0430 (CWE-319)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441 \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c\u0438 cURL \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u043b\u0438\u043d\u043d\u043e\u0441\u0442\u0438 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e, \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043d\u0435\u0441\u0430\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041f\u043e\u0434\u043c\u0435\u043d\u0430 \u043f\u0440\u0438 \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0438, \u041d\u0435\u0441\u0430\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0441\u0431\u043e\u0440 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://github.com/advisories/GHSA-5fgw-rv54-prjx\nhttp://www.openwall.com/lists/oss-security/2026/04/29/7\nhttps://curl.se/docs/CVE-2026-4873.html\nhttps://curl.se/docs/CVE-2026-4873.json\nhttps://hackerone.com/reports/3621851\nhttps://redos.red-soft.ru/search/?iblock_id=24\u0026q=CVE-2026-4873\nhttps://access.redhat.com/security/cve/cve-2026-4873\nhttps://ubuntu.com/security/CVE-2026-4873\nhttps://security-tracker.debian.org/tracker/CVE-2026-4873",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u041f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u043e\u0435 \u041f\u041e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-295, CWE-319",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,4)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,9)"
}

CVE-2026-4873 (GCVE-0-2026-4873)

Vulnerability from cvelistv5 – Published: 2026-05-13 08:27 – Updated: 2026-09-15 06:02

Title

connection reuse ignores TLS requirement

Summary

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-13 19:29 UTC

CWE

CWE-319 - Cleartext Transmission of Sensitive Information

Assigner

curl redhat root

References

4 references

URL	Tags
https://curl.se/docs/CVE-2026-4873.json
https://curl.se/docs/CVE-2026-4873.html
https://hackerone.com/reports/3621851
http://www.openwall.com/lists/oss-security/2026/04/29/7

Impacted products

3 products

Vendor	Product	Version
curl	curl	Affected: 7.20.0 , < 8.14.2 (semver) Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.0 (semver)
curl	curl	Affected: ec3bb8f727405642a471b4b1b9eb0118fc003104 , < 507e7be573b0a76fca597b75ff7cb27a66e7d865 (git)
curl	curl	Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 Affected: 7.80.0 Affected: 7.79.1 Affected: 7.79.0 Affected: 7.78.0 Affected: 7.77.0 Affected: 7.76.1 Affected: 7.76.0 Affected: 7.75.0 Affected: 7.74.0 Affected: 7.73.0 Affected: 7.72.0 Affected: 7.71.1 Affected: 7.71.0 Affected: 7.70.0 Affected: 7.69.1 Affected: 7.69.0 Affected: 7.68.0 Affected: 7.67.0 Affected: 7.66.0 Affected: 7.65.3 Affected: 7.65.2 Affected: 7.65.1 Affected: 7.65.0 Affected: 7.64.1 Affected: 7.64.0 Affected: 7.63.0 Affected: 7.62.0 Affected: 7.61.1 Affected: 7.61.0 Affected: 7.60.0 Affected: 7.59.0 Affected: 7.58.0 Affected: 7.57.0 Affected: 7.56.1 Affected: 7.56.0 Affected: 7.55.1 Affected: 7.55.0 Affected: 7.54.1 Affected: 7.54.0 Affected: 7.53.1 Affected: 7.53.0 Affected: 7.52.1 Affected: 7.52.0 Affected: 7.51.0 Affected: 7.50.3 Affected: 7.50.2 Affected: 7.50.1 Affected: 7.50.0 Affected: 7.49.1 Affected: 7.49.0 Affected: 7.48.0 Affected: 7.47.1 Affected: 7.47.0 Affected: 7.46.0 Affected: 7.45.0 Affected: 7.44.0 Affected: 7.43.0 Affected: 7.42.1 Affected: 7.42.0 Affected: 7.41.0 Affected: 7.40.0 Affected: 7.39.0 Affected: 7.38.0 Affected: 7.37.1 Affected: 7.37.0 Affected: 7.36.0 Affected: 7.35.0 Affected: 7.34.0 Affected: 7.33.0 Affected: 7.32.0 Affected: 7.31.0 Affected: 7.30.0 Affected: 7.29.0 Affected: 7.28.1 Affected: 7.28.0 Affected: 7.27.0 Affected: 7.26.0 Affected: 7.25.0 Affected: 7.24.0 Affected: 7.23.1 Affected: 7.23.0 Affected: 7.22.0 Affected: 7.21.7 Affected: 7.21.6 Affected: 7.21.5 Affected: 7.21.4 Affected: 7.21.3 Affected: 7.21.2 Affected: 7.21.1 Affected: 7.21.0 Affected: 7.20.1 Affected: 7.20.0

Credits

Arkadi Vainbrand Daniel Stenberg

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-13T09:05:12.559Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/04/29/7"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-4873",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T19:29:14.521822Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
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                "cweId": "CWE-319",
                "description": "CWE-319 Cleartext Transmission of Sensitive Information",
                "lang": "en",
                "type": "CWE"
              }
            ]
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-13T19:30:04.825Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "product": "curl",
          "vendor": "curl",
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          "versions": [
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              "lessThan": "507e7be573b0a76fca597b75ff7cb27a66e7d865",
              "status": "affected",
              "version": "ec3bb8f727405642a471b4b1b9eb0118fc003104",
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          "defaultStatus": "unaffected",
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          "versions": [
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              "version": "7.82.0"
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              "version": "7.59.0"
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              "version": "7.58.0"
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              "status": "affected",
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              "status": "affected",
              "version": "7.56.0"
            },
            {
              "status": "affected",
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            {
              "status": "affected",
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            {
              "status": "affected",
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            {
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            {
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              "version": "7.51.0"
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              "version": "7.50.3"
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              "version": "7.50.1"
            },
            {
              "status": "affected",
              "version": "7.50.0"
            },
            {
              "status": "affected",
              "version": "7.49.1"
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            {
              "status": "affected",
              "version": "7.49.0"
            },
            {
              "status": "affected",
              "version": "7.48.0"
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            {
              "status": "affected",
              "version": "7.47.1"
            },
            {
              "status": "affected",
              "version": "7.47.0"
            },
            {
              "status": "affected",
              "version": "7.46.0"
            },
            {
              "status": "affected",
              "version": "7.45.0"
            },
            {
              "status": "affected",
              "version": "7.44.0"
            },
            {
              "status": "affected",
              "version": "7.43.0"
            },
            {
              "status": "affected",
              "version": "7.42.1"
            },
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              "status": "affected",
              "version": "7.42.0"
            },
            {
              "status": "affected",
              "version": "7.41.0"
            },
            {
              "status": "affected",
              "version": "7.40.0"
            },
            {
              "status": "affected",
              "version": "7.39.0"
            },
            {
              "status": "affected",
              "version": "7.38.0"
            },
            {
              "status": "affected",
              "version": "7.37.1"
            },
            {
              "status": "affected",
              "version": "7.37.0"
            },
            {
              "status": "affected",
              "version": "7.36.0"
            },
            {
              "status": "affected",
              "version": "7.35.0"
            },
            {
              "status": "affected",
              "version": "7.34.0"
            },
            {
              "status": "affected",
              "version": "7.33.0"
            },
            {
              "status": "affected",
              "version": "7.32.0"
            },
            {
              "status": "affected",
              "version": "7.31.0"
            },
            {
              "status": "affected",
              "version": "7.30.0"
            },
            {
              "status": "affected",
              "version": "7.29.0"
            },
            {
              "status": "affected",
              "version": "7.28.1"
            },
            {
              "status": "affected",
              "version": "7.28.0"
            },
            {
              "status": "affected",
              "version": "7.27.0"
            },
            {
              "status": "affected",
              "version": "7.26.0"
            },
            {
              "status": "affected",
              "version": "7.25.0"
            },
            {
              "status": "affected",
              "version": "7.24.0"
            },
            {
              "status": "affected",
              "version": "7.23.1"
            },
            {
              "status": "affected",
              "version": "7.23.0"
            },
            {
              "status": "affected",
              "version": "7.22.0"
            },
            {
              "status": "affected",
              "version": "7.21.7"
            },
            {
              "status": "affected",
              "version": "7.21.6"
            },
            {
              "status": "affected",
              "version": "7.21.5"
            },
            {
              "status": "affected",
              "version": "7.21.4"
            },
            {
              "status": "affected",
              "version": "7.21.3"
            },
            {
              "status": "affected",
              "version": "7.21.2"
            },
            {
              "status": "affected",
              "version": "7.21.1"
            },
            {
              "status": "affected",
              "version": "7.21.0"
            },
            {
              "status": "affected",
              "version": "7.20.1"
            },
            {
              "status": "affected",
              "version": "7.20.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Arkadi Vainbrand"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Daniel Stenberg"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability exists where a connection requiring TLS incorrectly reuses an\nexisting unencrypted connection from the same connection pool. If an initial\ntransfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request\nto that same host bypasses the TLS requirement and instead transmit data\nunencrypted."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-319",
              "description": "Cleartext Transmission of Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T06:02:57.389Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "url": "https://curl.se/docs/CVE-2026-4873.json"
        },
        {
          "url": "https://curl.se/docs/CVE-2026-4873.html"
        },
        {
          "url": "https://hackerone.com/reports/3621851"
        }
      ],
      "title": "connection reuse ignores TLS requirement",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_osv": {
        "affected": [
          {
            "ranges": [
              {
                "events": [
                  {
                    "introduced": "7.20.0"
                  },
                  {
                    "fixed": "8.14.2"
                  },
                  {
                    "introduced": "8.15.0"
                  },
                  {
                    "fixed": "8.16.1"
                  },
                  {
                    "introduced": "8.17.0"
                  },
                  {
                    "fixed": "8.20.0"
                  }
                ],
                "type": "SEMVER"
              },
              {
                "events": [
                  {
                    "introduced": "ec3bb8f727405642a471b4b1b9eb0118fc003104"
                  },
                  {
                    "fixed": "507e7be573b0a76fca597b75ff7cb27a66e7d865"
                  }
                ],
                "repo": "https://github.com/curl/curl.git",
                "type": "GIT"
              }
            ],
            "versions": [
              "8.19.0",
              "8.18.0",
              "8.17.0",
              "8.16.0",
              "8.15.0",
              "8.14.1",
              "8.14.0",
              "8.13.0",
              "8.12.1",
              "8.12.0",
              "8.11.1",
              "8.11.0",
              "8.10.1",
              "8.10.0",
              "8.9.1",
              "8.9.0",
              "8.8.0",
              "8.7.1",
              "8.7.0",
              "8.6.0",
              "8.5.0",
              "8.4.0",
              "8.3.0",
              "8.2.1",
              "8.2.0",
              "8.1.2",
              "8.1.1",
              "8.1.0",
              "8.0.1",
              "8.0.0",
              "7.88.1",
              "7.88.0",
              "7.87.0",
              "7.86.0",
              "7.85.0",
              "7.84.0",
              "7.83.1",
              "7.83.0",
              "7.82.0",
              "7.81.0",
              "7.80.0",
              "7.79.1",
              "7.79.0",
              "7.78.0",
              "7.77.0",
              "7.76.1",
              "7.76.0",
              "7.75.0",
              "7.74.0",
              "7.73.0",
              "7.72.0",
              "7.71.1",
              "7.71.0",
              "7.70.0",
              "7.69.1",
              "7.69.0",
              "7.68.0",
              "7.67.0",
              "7.66.0",
              "7.65.3",
              "7.65.2",
              "7.65.1",
              "7.65.0",
              "7.64.1",
              "7.64.0",
              "7.63.0",
              "7.62.0",
              "7.61.1",
              "7.61.0",
              "7.60.0",
              "7.59.0",
              "7.58.0",
              "7.57.0",
              "7.56.1",
              "7.56.0",
              "7.55.1",
              "7.55.0",
              "7.54.1",
              "7.54.0",
              "7.53.1",
              "7.53.0",
              "7.52.1",
              "7.52.0",
              "7.51.0",
              "7.50.3",
              "7.50.2",
              "7.50.1",
              "7.50.0",
              "7.49.1",
              "7.49.0",
              "7.48.0",
              "7.47.1",
              "7.47.0",
              "7.46.0",
              "7.45.0",
              "7.44.0",
              "7.43.0",
              "7.42.1",
              "7.42.0",
              "7.41.0",
              "7.40.0",
              "7.39.0",
              "7.38.0",
              "7.37.1",
              "7.37.0",
              "7.36.0",
              "7.35.0",
              "7.34.0",
              "7.33.0",
              "7.32.0",
              "7.31.0",
              "7.30.0",
              "7.29.0",
              "7.28.1",
              "7.28.0",
              "7.27.0",
              "7.26.0",
              "7.25.0",
              "7.24.0",
              "7.23.1",
              "7.23.0",
              "7.22.0",
              "7.21.7",
              "7.21.6",
              "7.21.5",
              "7.21.4",
              "7.21.3",
              "7.21.2",
              "7.21.1",
              "7.21.0",
              "7.20.1",
              "7.20.0"
            ]
          }
        ],
        "aliases": [
          "CVE-2026-4873"
        ],
        "credits": [
          {
            "name": "Arkadi Vainbrand",
            "type": "finder"
          },
          {
            "name": "Daniel Stenberg",
            "type": "remediation developer"
          }
        ],
        "database_specific": {
          "CWE": {
            "desc": "Cleartext Transmission of Sensitive Information",
            "id": "CWE-319"
          },
          "URL": "https://curl.se/docs/CVE-2026-4873.json",
          "affects": "both",
          "issue": "https://hackerone.com/reports/3621851",
          "last_affected": "8.19.0",
          "package": "curl",
          "severity": "Low",
          "www": "https://curl.se/docs/CVE-2026-4873.html"
        },
        "details": "A vulnerability exists where a connection requiring TLS incorrectly reuses an\nexisting unencrypted connection from the same connection pool. If an initial\ntransfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request\nto that same host bypasses the TLS requirement and instead transmit data\nunencrypted.",
        "id": "CURL-CVE-2026-4873",
        "modified": "2026-09-07T10:34:51.00Z",
        "published": "2026-04-29T08:00:00.00Z",
        "schema_version": "1.5.0",
        "summary": "connection reuse ignores TLS requirement"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2026-4873",
    "datePublished": "2026-05-13T08:27:04.538Z",
    "dateReserved": "2026-03-26T05:38:02.098Z",
    "dateUpdated": "2026-09-15T06:02:57.389Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2026-09770 (CVE-2026-4873)

CVE-2026-4873 (GCVE-0-2026-4873)

Tags

Sightings

Nomenclature

Related by attack behaviour