GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
rlsa-2026:65160
Vulnerability from osv_rocky
Published
2026-09-09 06:01
Modified
2026-09-16 12:13
Summary
Important: thunderbird security update
Details

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Site isolation issue in the Graphics: CanvasWebGL component (CVE-2026-74934)

  • firefox: thunderbird: Privilege escalation in the Networking: Cookies component (CVE-2026-74953)

  • firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74987)

  • firefox: thunderbird: Information disclosure in the Graphics component (CVE-2026-74948)

  • firefox: thunderbird: Information disclosure in the DOM: UI Events & Focus Handling component (CVE-2026-74971)

  • firefox: thunderbird: Privilege escalation in the Graphics: CanvasWebGL component (CVE-2026-74941)

  • firefox: Privilege escalation in the Shell Integration component (CVE-2026-74965)

  • firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-74946)

  • firefox: Race condition, use-after-free in the Graphics component (CVE-2026-74973)

  • firefox: thunderbird: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74990)

  • firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-74940)

  • firefox: thunderbird: Site isolation issue in the WebExtensions component (CVE-2026-74960)

  • firefox: thunderbird: Mitigation bypass in the Storage: Cache API component (CVE-2026-74959)

  • firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-74976)

  • firefox: thunderbird: Same-origin policy bypass in the Graphics: ImageLib component (CVE-2026-74974)

  • firefox: thunderbird: Mitigation bypass in the Safe Browsing component (CVE-2026-74957)

  • firefox: thunderbird: Same-origin policy bypass in the Audio/Video: Playback component (CVE-2026-74967)

  • firefox: Privilege escalation in the Remote Settings Client component (CVE-2026-74942)

  • firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-74939)

  • firefox: thunderbird: Information disclosure in the DOM: Push Subscriptions component (CVE-2026-74972)

  • firefox: thunderbird: Information disclosure in the Graphics: Text component (CVE-2026-74945)

  • firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component (CVE-2026-74963)

  • firefox: Integer overflow in the Graphics component (CVE-2026-74964)

  • firefox: Site isolation issue in the Networking: Cookies component (CVE-2026-74962)

  • firefox: thunderbird: Privilege escalation in the DOM: Networking component (CVE-2026-74935)

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.

References
https://errata.rockylinux.org/RLSA-2026:65160 ADVISORY
https://bugzilla.redhat.com/show_bug.cgi?id=2517820 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517822 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517823 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517825 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517831 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517833 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517834 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517835 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517836 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517839 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517841 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517845 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517849 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517851 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517853 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517856 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517858 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517859 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517860 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517862 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517863 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517866 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517870 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517872 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2517874 REPORT
https://access.redhat.com/errata/RHSA-2026:65160 ADVISORY

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "thunderbird",
        "purl": "pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-8\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:140.14.0-1.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:65160"
  },
  "details": "Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Site isolation issue in the Graphics: CanvasWebGL component (CVE-2026-74934)\n\n* firefox: thunderbird: Privilege escalation in the Networking: Cookies component (CVE-2026-74953)\n\n* firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74987)\n\n* firefox: thunderbird: Information disclosure in the Graphics component (CVE-2026-74948)\n\n* firefox: thunderbird: Information disclosure in the DOM: UI Events \u0026 Focus Handling component (CVE-2026-74971)\n\n* firefox: thunderbird: Privilege escalation in the Graphics: CanvasWebGL component (CVE-2026-74941)\n\n* firefox: Privilege escalation in the Shell Integration component (CVE-2026-74965)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-74946)\n\n* firefox: Race condition, use-after-free in the Graphics component (CVE-2026-74973)\n\n* firefox: thunderbird: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74990)\n\n* firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-74940)\n\n* firefox: thunderbird: Site isolation issue in the WebExtensions component (CVE-2026-74960)\n\n* firefox: thunderbird: Mitigation bypass in the Storage: Cache API component (CVE-2026-74959)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-74976)\n\n* firefox: thunderbird: Same-origin policy bypass in the Graphics: ImageLib component (CVE-2026-74974)\n\n* firefox: thunderbird: Mitigation bypass in the Safe Browsing component (CVE-2026-74957)\n\n* firefox: thunderbird: Same-origin policy bypass in the Audio/Video: Playback component (CVE-2026-74967)\n\n* firefox: Privilege escalation in the Remote Settings Client component (CVE-2026-74942)\n\n* firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-74939)\n\n* firefox: thunderbird: Information disclosure in the DOM: Push Subscriptions component (CVE-2026-74972)\n\n* firefox: thunderbird: Information disclosure in the Graphics: Text component (CVE-2026-74945)\n\n* firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component (CVE-2026-74963)\n\n* firefox: Integer overflow in the Graphics component (CVE-2026-74964)\n\n* firefox: Site isolation issue in the Networking: Cookies component (CVE-2026-74962)\n\n* firefox: thunderbird: Privilege escalation in the DOM: Networking component (CVE-2026-74935)\n\nFor 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.",
  "id": "RLSA-2026:65160",
  "modified": "2026-09-16T12:13:41.644625Z",
  "published": "2026-09-09T06:01:32.269149Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:65160"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517820"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517822"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517823"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517825"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517831"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517833"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517834"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517835"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517836"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517839"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517841"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517845"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517849"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517851"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517853"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517856"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517858"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517859"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517860"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517862"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517863"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517866"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517870"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517872"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517874"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:65160"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: thunderbird security update",
  "upstream": [
    "CVE-2026-74934",
    "CVE-2026-74935",
    "CVE-2026-74939",
    "CVE-2026-74940",
    "CVE-2026-74941",
    "CVE-2026-74942",
    "CVE-2026-74945",
    "CVE-2026-74946",
    "CVE-2026-74948",
    "CVE-2026-74953",
    "CVE-2026-74957",
    "CVE-2026-74959",
    "CVE-2026-74960",
    "CVE-2026-74962",
    "CVE-2026-74963",
    "CVE-2026-74964",
    "CVE-2026-74965",
    "CVE-2026-74967",
    "CVE-2026-74971",
    "CVE-2026-74972",
    "CVE-2026-74973",
    "CVE-2026-74974",
    "CVE-2026-74976",
    "CVE-2026-74987",
    "CVE-2026-74990"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

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.


Loading…