Vulnerability-Lookup

OESA-2026-3142 (CVE-2026-59083)

Vulnerability from osv_openeuler – Published: 2026-07-24 11:12 – Updated: 2026-08-06 11:12 – Source website

Summary

tomcat security update

Details

Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process.

Security Fix(es):

Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected.

Users are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120, which fix the issue.(CVE-2026-59083)

'Severity: low\n\nAffected versions:\n\n- Apache Tomcat 11.0.0-M1 through 11.0.23\n- Apache Tomcat 10.1.0-M1 through 10.1.56\n- Apache Tomcat 9.0.13 through 9.0.119\n- Apache Tomcat 8.5.38 through 8.5.100\n- Apache Tomcat 7.0.100 through 7.0.109\n\nDescription:', 'Credit:\n\nNDIx (reporter)\n\nReferences:'

Severity

9.1 (Critical)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-59083	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-59084	ADVISORY

JSON

To clipboard

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  "affected": [
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      "ecosystem_specific": {
        "noarch": [
          "tomcat-9.0.120-1.oe2203sp4.noarch.rpm",
          "tomcat-help-9.0.120-1.oe2203sp4.noarch.rpm",
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      },
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  },
  "details": "Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process.\r\n\r\nSecurity Fix(es):\n\nImproper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat\u0026apos;s rewrite valve allowed security constraint bypass for some configurations.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, from 8.5.0 through 8.5.100.\u00a0Other versions that have reached end of support may also be affected.\n\nUsers are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120, which fix the issue.(CVE-2026-59083)\n\n[\u0026apos;Severity: low\\n\\nAffected versions:\\n\\n- Apache Tomcat 11.0.0-M1 through 11.0.23\\n- Apache Tomcat 10.1.0-M1 through 10.1.56\\n- Apache Tomcat 9.0.13 through 9.0.119\\n- Apache Tomcat 8.5.38 through 8.5.100\\n- Apache Tomcat 7.0.100 through 7.0.109\\n\\nDescription:\u0026apos;, \u0026apos;Credit:\\n\\nNDIx (reporter)\\n\\nReferences:\u0026apos;](CVE-2026-59084)",
  "id": "OESA-2026-3142",
  "modified": "2026-08-06T11:12:01Z",
  "published": "2026-07-24T11:12:01Z",
  "references": [
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      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3142"
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59084"
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    }
  ],
  "summary": "tomcat security update",
  "upstream": [
    "CVE-2026-59083",
    "CVE-2026-59084"
  ]
}

CVE-2026-59083 (GCVE-0-2026-59083)

Vulnerability from cvelistv5 – Published: 2026-07-14 08:13 – Updated: 2026-07-14 12:19

Title

Apache Tomcat: Incorrect URL decoding in RewriteValve may allow security control bypass

Summary

Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120, which fix the issue.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-14 12:19 UTC

CWE

CWE-177 - Improper Handling of URL Encoding (Hex Encoding)

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread/3g63zos2gkjo5vgnr…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/07/14/7

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.23 (semver) Affected: 10.1.0-M1 , ≤ 10.1.56 (semver) Affected: 9.0.0.M1 , ≤ 9.0.119 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Unaffected: 0 , < 8.0.0 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-59084 (GCVE-0-2026-59084)

Vulnerability from cvelistv5 – Published: 2026-07-14 08:24 – Updated: 2026-07-14 13:51

Title

Apache Tomcat: EncryptInterceptor requirements not clearly documented

Summary

Insufficient Technical Documentation vulnerability in Apache Tomcat since the requirements to securely configure the EncryptInterceptor were not clearly documented. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.13 through 9.0.119, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120 which fix the issue.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-14 13:51 UTC

CWE

CWE-1059 - Insufficient Technical Documentation

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread/7w9746ootcxo0gvx2…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/07/14/8

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.23 (semver) Affected: 10.1.0-M1 , ≤ 10.1.56 (semver) Affected: 9.0.13 , ≤ 9.0.119 (semver) Affected: 8.5.38 , ≤ 8.5.100 (semver) Affected: 7.0.100 , ≤ 7.0.109 (semver)

Credits

NDIx

Show details on NVD website

JSON

To clipboard

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  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-59084",
    "datePublished": "2026-07-14T08:24:21.531Z",
    "dateReserved": "2026-07-02T10:42:32.668Z",
    "dateUpdated": "2026-07-14T13:51:52.489Z",
    "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.

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

OESA-2026-3142 (CVE-2026-59083)

CVE-2026-59083 (GCVE-0-2026-59083)

CVE-2026-59084 (GCVE-0-2026-59084)

Tags

Sightings

Nomenclature

Related by attack behaviour