Vulnerability-Lookup

RHSA-2026:19157

Vulnerability from csaf_redhat - Published: 2026-05-19 16:15 - Updated: 2026-05-20 16:09

Summary

Red Hat Security Advisory: firefox security update

Severity

Important

Notes

Topic: An update for firefox is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1 (CVE-2026-7323) * firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component (CVE-2026-7320) * firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 (CVE-2026-7322) * firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-7321) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-7320

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure due to incorrect boundary conditions in the Audio/Video component

7.5 (High)


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

CWE-125 - Out-of-bounds Read

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.src	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix

Threats

Impact Important

CVE-2026-7321

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component

6.1 (Medium)


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

CWE-501 - Trust Boundary Violation

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.src	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix

Threats

Impact Moderate

CVE-2026-7322

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.

8.8 (High)


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

CWE-787 - Out-of-bounds Write

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.src	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix

Threats

Impact Important

CVE-2026-7323

7.5 (High)


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

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.src	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debuginfo-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:firefox-debugsource-0:140.10.1-1.el10_2.x86_64	—	Vendor Fix fix

Threats

Impact Important

References

31 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:19157	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2463481	external
https://bugzilla.redhat.com/show_bug.cgi?id=2463483	external
https://bugzilla.redhat.com/show_bug.cgi?id=2463484	external
https://bugzilla.redhat.com/show_bug.cgi?id=2463485	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-7320	self
https://bugzilla.redhat.com/show_bug.cgi?id=2463483	external
https://www.cve.org/CVERecord?id=CVE-2026-7320	external
https://nvd.nist.gov/vuln/detail/CVE-2026-7320	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://access.redhat.com/security/cve/CVE-2026-7321	self
https://bugzilla.redhat.com/show_bug.cgi?id=2463485	external
https://www.cve.org/CVERecord?id=CVE-2026-7321	external
https://nvd.nist.gov/vuln/detail/CVE-2026-7321	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://access.redhat.com/security/cve/CVE-2026-7322	self
https://bugzilla.redhat.com/show_bug.cgi?id=2463484	external
https://www.cve.org/CVERecord?id=CVE-2026-7322	external
https://nvd.nist.gov/vuln/detail/CVE-2026-7322	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://access.redhat.com/security/cve/CVE-2026-7323	self
https://bugzilla.redhat.com/show_bug.cgi?id=2463481	external
https://www.cve.org/CVERecord?id=CVE-2026-7323	external
https://nvd.nist.gov/vuln/detail/CVE-2026-7323	external
https://www.mozilla.org/security/advisories/mfsa2…	external
https://www.mozilla.org/security/advisories/mfsa2…	external

JSON

To clipboard

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      "title": "firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1"
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      "cve": "CVE-2026-7323",
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    }
  ]
}

CVE-2026-7320 (GCVE-0-2026-7320)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:49 – Updated: 2026-04-30 17:19

Title

Information disclosure due to incorrect boundary conditions in the Audio/Video component

Summary

Information disclosure due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

Severity ?

7.5 (High)


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

CWE

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Assigner

mozilla

References

6 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2027433
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 115.35.1 , ≤ 115.* (rpm) Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150.0.1 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150.0.1 , ≤ * (rpm)

Credits

Xuehao Guo

Show details on NVD website

JSON

To clipboard

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      "title": "Information disclosure due to incorrect boundary conditions in the Audio/Video component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-7320",
    "datePublished": "2026-04-28T13:49:08.262Z",
    "dateReserved": "2026-04-28T13:42:15.666Z",
    "dateUpdated": "2026-04-30T17:19:50.682Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-7321 (GCVE-0-2026-7321)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:49 – Updated: 2026-04-30 17:19

Title

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component

Summary

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.

Severity ?

9.6 (Critical)


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

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

mozilla

References

5 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm)

Credits

The Mozilla Fuzzing Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.6,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-7321",
                "options": [
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                    "Exploitation": "none"
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                    "Technical Impact": "total"
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                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
              {
                "cweId": "CWE-120",
                "description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-28T14:48:37.871Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.1",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150",
              "versionType": "rpm"
            }
          ]
        },
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          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.1",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "The Mozilla Fuzzing Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1."
            }
          ],
          "value": "Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-30T17:19:49.963Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2029461"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-36/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-39/"
        }
      ],
      "title": "Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-7321",
    "datePublished": "2026-04-28T13:49:12.432Z",
    "dateReserved": "2026-04-28T13:42:16.846Z",
    "dateUpdated": "2026-04-30T17:19:49.963Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-7322 (GCVE-0-2026-7322)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:49 – Updated: 2026-05-07 15:22

Title

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Summary

Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

Severity ?

7.3 (High)


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

CWE

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-416 - Use After Free

Assigner

mozilla

References

6 references

URL	Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 115.35.1 , ≤ 115.* (rpm) Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150.0.1 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150.0.1 , ≤ * (rpm)

Credits

C.M.Chang, Christian Holler, Steve Fink and the Mozilla Fuzzing Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-7322",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-30T03:55:55.566591Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-119",
                "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-30T10:20:27.399Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "115.*",
              "status": "unaffected",
              "version": "115.35.1",
              "versionType": "rpm"
            },
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              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.1",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150.0.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.1",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150.0.1",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "C.M.Chang, Christian Holler, Steve Fink and the Mozilla Fuzzing Team"
        }
      ],
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        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1."
            }
          ],
          "value": "Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T15:22:40.028Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "name": "Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1",
          "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021904%2C2022731%2C2027158%2C2027733%2C2027973%2C2027976%2C2028231%2C2028731%2C2028886%2C2029067%2C2029700%2C2029724%2C2029806%2C2029814%2C2030108%2C2030111%2C2031524%2C2031921%2C2032040"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-35/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-36/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-37/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-38/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-39/"
        }
      ],
      "title": "Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
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    "dateUpdated": "2026-05-07T15:22:40.028Z",
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  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-7323 (GCVE-0-2026-7323)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:49 – Updated: 2026-05-07 15:22

Title

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Summary

Severity ?

7.3 (High)


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

CWE

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787 - Out-of-bounds Write

Assigner

mozilla

References

5 references

URL	Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150.0.1 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.1 , ≤ 140.* (rpm) Unaffected: 150.0.1 , ≤ * (rpm)

Credits

Ryan Hunt, Steve Fink and the Mozilla Fuzzing Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-7323",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-30T03:55:56.707390Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-119",
                "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-30T10:20:17.946Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.1",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150.0.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
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              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.1",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150.0.1",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
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      ],
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          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1."
            }
          ],
          "value": "Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T15:22:40.336Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
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        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-35/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-36/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-38/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-39/"
        }
      ],
      "title": "Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
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    "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.

Action not permitted

RHSA-2026:19157

CVE-2026-7320 (GCVE-0-2026-7320)

CVE-2026-7321 (GCVE-0-2026-7321)

CVE-2026-7322 (GCVE-0-2026-7322)

CVE-2026-7323 (GCVE-0-2026-7323)

Tags

Sightings

Nomenclature