RLSA-2026:58898

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Source
https://errata.rockylinux.org/RLSA-2026:58898
Import Source
https://storage.googleapis.com/resf-osv-data/RLSA-2026:58898.json
JSON Data
https://api.osv.dev/v1/vulns/RLSA-2026:58898
Upstream
  • CVE-2026-74934
  • CVE-2026-74935
  • CVE-2026-74936
  • CVE-2026-74939
  • CVE-2026-74940
  • CVE-2026-74941
  • CVE-2026-74942
  • CVE-2026-74943
  • CVE-2026-74944
  • CVE-2026-74945
  • CVE-2026-74946
  • CVE-2026-74948
  • CVE-2026-74949
  • 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-2026-74969
  • CVE-2026-74971
  • CVE-2026-74972
  • CVE-2026-74973
  • CVE-2026-74974
  • CVE-2026-74976
  • CVE-2026-74983
  • CVE-2026-74987
  • CVE-2026-74990
Published
2026-08-25T06:01:14.220590Z
Modified
2026-08-26T01:10:08.808740296Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Important: firefox security update
Details

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Mitigation bypass in the Data Loss Prevention component (CVE-2026-74983)

  • 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: Use-after-free in the Graphics: ImageLib component (CVE-2026-74943)

  • 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: Privilege escalation due to use-after-free in the Graphics: Canvas2D component (CVE-2026-74949)

  • 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 JavaScript: WebAssembly component (CVE-2026-74936)

  • 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: Use-after-free in the Layout: Text and Fonts component (CVE-2026-74969)

  • 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: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-74944)

  • 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.

Database specific 
{
    "source_advisory": "RHSA-2026:58898",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "license": "CC-BY-4.0"
}
References
Credits
    • Rocky Enterprise Software Foundation
    • Red Hat

Affected packages

Rocky Linux:8 / firefox

Package

Name
firefox
Purl
pkg:rpm/rocky-linux/firefox?distro=rocky-linux-8&epoch=0

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0:140.14.0-1.el8_10
Database specific
Show details 
{
    "yum_repository": "AppStream"
}

Database specific

source 
"https://storage.googleapis.com/resf-osv-data/RLSA-2026:58898.json"