CVE-2026-92029
published 2026-09-15CVE-2026-92029: Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156…
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.32%
23.0th percentile
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 115.41.0 | 115.41.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 116.0 < 140.16.0 | 140.16.0 |
| 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 115.41 | Firefox ESR 115.41 |
| 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 140.16 | Thunderbird 140.16 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| 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
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat7.5HIGH
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Red Hat
firefox: thunderbird: Use-after-free in the SVG component
vendor_redhat·2026-09-15·CVSS 7.5
CVE-2026-92029 [HIGH] CWE-825 firefox: thunderbird: Use-after-free in the SVG component
firefox: thunderbird: Use-after-free in the SVG component
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, 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 SVG 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
Package: thunderbird (Red Hat Enterprise Lin
Mozilla
Mozilla Foundation Security Advisory 2026-95: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-95: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-95
CVE: CVE-2026-92029
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 140.16
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92029
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-96: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92029
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92029
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-91: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-91: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-91
CVE: CVE-2026-92029
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.41
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92029
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-92: CVE-2026-92029
vendor_mozilla
CVE-2026-92029 Mozilla Foundation Security Advisory 2026-92: CVE-2026-92029
Mozilla Foundation Security Advisory 2026-92
CVE: CVE-2026-92029
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.16
VulDB
Mozilla Firefox up to 115.40/140.15/153.2/155 SVG use after free (Nessus ID 350767 / WID-SEC-2026-3375)
vuldb·2026-09-28·CVSS 8.8
CVE-2026-92029 [HIGH] Mozilla Firefox up to 115.40/140.15/153.2/155 SVG use after free (Nessus ID 350767 / WID-SEC-2026-3375)
A vulnerability was found in Mozilla Firefox up to 115.40/140.15/153.2/155 and classified as critical. Affected by this vulnerability is an unknown functionality of the component SVG. The manipulation results in use after free.
This vulnerability is cataloged as CVE-2026-92029. The attack may be launched remotely. There is no exploit available.
It is suggested to upgrade the affected component.
GHSA
Use-after-free in the SVG component.
ghsa_unreviewed·2026-09-15
CVE-2026-92029 Use-after-free in the SVG component.
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-92029 firefox: thunderbird: Use-after-free in the SVG component
bugzilla·2026-09-15
CVE-2026-92029 [HIGH] CVE-2026-92029 firefox: thunderbird: Use-after-free in the SVG component
CVE-2026-92029 firefox: thunderbird: Use-after-free in the SVG component
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.
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.
## ⚡ Threat of the Week
C
https://bugzilla.mozilla.org/show_bug.cgi?id=2068445https://www.mozilla.org/security/advisories/mfsa2026-90/https://www.mozilla.org/security/advisories/mfsa2026-91/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