RHSA-2026:4432
Vulnerability from csaf_redhat - Published: 2026-03-12 08:19 - Updated: 2026-03-12 19:08Summary
Red Hat Security Advisory: thunderbird security update
Notes
Topic
An update for thunderbird is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support.
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 Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* libvpx: Heap buffer overflow in libvpx (CVE-2026-2447)
* firefox: Invalid pointer in the JavaScript Engine component (CVE-2026-2785)
* firefox: Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148 (CVE-2026-2793)
* firefox: Undefined behavior in the DOM: Core & HTML component (CVE-2026-2771)
* firefox: Integer overflow in the Audio/Video component (CVE-2026-2774)
* firefox: Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software (CVE-2026-2776)
* firefox: Integer overflow in the Libraries component in NSS (CVE-2026-2781)
* firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-2766)
* firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-2769)
* firefox: Use-after-free in the DOM: Window and Location component (CVE-2026-2787)
* firefox: Sandbox escape in the Storage: IndexedDB component (CVE-2026-2768)
* firefox: Information disclosure due to JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-2783)
* firefox: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-2788)
* firefox: Mitigation bypass in the DOM: Security component (CVE-2026-2784)
* firefox: Incorrect boundary conditions in the Graphics: ImageLib component (CVE-2026-2759)
* firefox: Integer overflow in the JavaScript: Standard Library component (CVE-2026-2762)
* firefox: Sandbox escape in the Graphics: WebRender component (CVE-2026-2761)
* firefox: Privilege escalation in the Messaging System component (CVE-2026-2777)
* firefox: Same-origin policy bypass in the Networking: JAR component (CVE-2026-2790)
* firefox: Mitigation bypass in the DOM: HTML Parser component (CVE-2026-2775)
* firefox: Use-after-free in the JavaScript Engine component (CVE-2026-2763)
* firefox: Memory safety bugs fixed in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148 (CVE-2026-2792)
* firefox: Incorrect boundary conditions in the Web Audio component (CVE-2026-2773)
* firefox: Use-after-free in the JavaScript Engine component (CVE-2026-2786)
* firefox: Use-after-free in the Graphics: ImageLib component (CVE-2026-2789)
* firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Audio/Video component (CVE-2026-2757)
* firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component (CVE-2026-2760)
* firefox: Use-after-free in the Audio/Video: Playback component (CVE-2026-2772)
* firefox: Incorrect boundary conditions in the Networking: JAR component (CVE-2026-2779)
* firefox: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-2767)
* firefox: JIT miscompilation, use-after-free in the JavaScript Engine: JIT component (CVE-2026-2764)
* firefox: Privilege escalation in the Netmonitor component (CVE-2026-2782)
* firefox: Use-after-free in the JavaScript Engine component (CVE-2026-2765)
* firefox: Privilege escalation in the Netmonitor component (CVE-2026-2780)
* firefox: Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component (CVE-2026-2778)
* firefox: Use-after-free in the JavaScript: GC component (CVE-2026-2758)
* firefox: Mitigation bypass in the Networking: Cache component (CVE-2026-2791)
* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-2770)
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.
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"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"AppStream-8.2.0.Z.AUS:thunderbird-0:140.8.0-1.el8_2.src",
"AppStream-8.2.0.Z.AUS:thunderbird-0:140.8.0-1.el8_2.x86_64",
"AppStream-8.2.0.Z.AUS:thunderbird-debuginfo-0:140.8.0-1.el8_2.x86_64",
"AppStream-8.2.0.Z.AUS:thunderbird-debugsource-0:140.8.0-1.el8_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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