CVE-2026-92005
published 2026-09-15CVE-2026-92005: Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156…
PriorityP428medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
0.36%
27.9th percentile
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Affected
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 140.16.0 | 140.16.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 141.0 < 153.3.0 | 153.3.0 |
| mozilla | firefox | >= 154.0.0 < 156.0.0 | 156.0.0 |
| mozilla | firefox_esr | < Firefox ESR 153.3 | Firefox ESR 153.3 |
| mozilla | firefox_esr | < Firefox ESR 140.16 | Firefox ESR 140.16 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < Thunderbird 140.16 | Thunderbird 140.16 |
| mozilla | thunderbird | < 140.16.0 | 140.16.0 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 141.0 < 153.3.0 | 153.3.0 |
| mozilla | thunderbird | >= 154.0 < 156.0 | 156.0 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
vendor_redhat5.3MEDIUM
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Red Hat
firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component
vendor_redhat·2026-09-15·CVSS 5.3
CVE-2026-92005 [MEDIUM] CWE-825 firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component
firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Use-after-free in the Audio/Video: Web Codecs component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Pack
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92005
vendor_mozilla
CVE-2026-92005 Mozilla Foundation Security Advisory 2026-96: CVE-2026-92005
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92005
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92005
vendor_mozilla
CVE-2026-92005 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92005
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92005
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92005
vendor_mozilla
CVE-2026-92005 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92005
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92005
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92005
vendor_mozilla
CVE-2026-92005 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92005
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92005
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-95: CVE-2026-92005
vendor_mozilla
CVE-2026-92005 Mozilla Foundation Security Advisory 2026-95: CVE-2026-92005
Mozilla Foundation Security Advisory 2026-95
CVE: CVE-2026-92005
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 140.16
Mozilla
Mozilla Foundation Security Advisory 2026-92: CVE-2026-92005
vendor_mozilla
CVE-2026-92005 Mozilla Foundation Security Advisory 2026-92: CVE-2026-92005
Mozilla Foundation Security Advisory 2026-92
CVE: CVE-2026-92005
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.16
VulDB
Mozilla Firefox up to 140.15/153.2/155 Web Codecs use after free (Nessus ID 345908)
vuldb·2026-09-16
CVE-2026-92005 [CRITICAL] Mozilla Firefox up to 140.15/153.2/155 Web Codecs use after free (Nessus ID 345908)
A vulnerability described as critical has been identified in Mozilla Firefox up to 140.15/153.2/155. This affects an unknown part of the component Web Codecs. Executing a manipulation can lead to use after free.
The identification of this vulnerability is CVE-2026-92005. The attack may be launched remotely. There is no exploit available.
Upgrading the affected component is recommended.
GHSA
Use-after-free in the Audio/Video: Web Codecs component.
ghsa_unreviewed·2026-09-15
CVE-2026-92005 Use-after-free in the Audio/Video: Web Codecs component.
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
Hackernews
⚡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
blogs_hackernews·2026-09-21·CVSS 10.0
CVE-2026-76460 [CRITICAL] ⚡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
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## ⚡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
A browser. A plugin. A package. A login screen. Normal stuff. That is basically the problem this week.
The trouble keeps showing up inside things people already trust: code that takes a bad turn, old payloads coming back, exposed systems, weak checks, fake fixes, and attack paths that look almost too easy. Even the research side is getting messy, with more findings, more automation, and not always more clarity.
Nothing here needs much drama. Just a lot of small doors left open. Here’s what happened.
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Bugzilla
CVE-2026-92005 firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component
bugzilla·2026-09-15
CVE-2026-92005 [HIGH] CVE-2026-92005 firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component
CVE-2026-92005 firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3.
https://bugzilla.mozilla.org/show_bug.cgi?id=2056051https://www.mozilla.org/security/advisories/mfsa2026-90/https://www.mozilla.org/security/advisories/mfsa2026-92/https://www.mozilla.org/security/advisories/mfsa2026-93/https://www.mozilla.org/security/advisories/mfsa2026-94/https://www.mozilla.org/security/advisories/mfsa2026-95/https://www.mozilla.org/security/advisories/mfsa2026-96/
2026-09-15
Published