CVE-2026-117906
published 2026-10-27CVE-2026-117906: Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird…
PriorityP426high7.5
EPSS
0.19%
8.3th percentile
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 159 | Firefox 159 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 115.44 | Firefox ESR 115.44 |
| mozilla | firefox_esr | < Firefox ESR 153.6 | Firefox ESR 153.6 |
| mozilla | thunderbird | < Thunderbird 153.6 | Thunderbird 153.6 |
| mozilla | thunderbird | < Thunderbird 159 | Thunderbird 159 |
| rhel10 | firefox-flatpak | — | — |
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Red Hat
firefox: Use-after-free in the CSS Parsing and Computation component
vendor_redhat·2026-10-27·CVSS 7.5
CVE-2026-117906 [HIGH] CWE-825 firefox: Use-after-free in the CSS Parsing and Computation component
firefox: Use-after-free in the CSS Parsing and Computation component
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Use-after-free in the CSS Parsing and Computation 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: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 7) - A
Mozilla
Mozilla Foundation Security Advisory 2026-119: CVE-2026-117906
vendor_mozilla
CVE-2026-117906 Mozilla Foundation Security Advisory 2026-119: CVE-2026-117906
Mozilla Foundation Security Advisory 2026-119
CVE: CVE-2026-117906
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 115.44
Mozilla
Mozilla Foundation Security Advisory 2026-122: CVE-2026-117906
vendor_mozilla
CVE-2026-117906 Mozilla Foundation Security Advisory 2026-122: CVE-2026-117906
Mozilla Foundation Security Advisory 2026-122
CVE: CVE-2026-117906
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.6
Mozilla
Mozilla Foundation Security Advisory 2026-121: CVE-2026-117906
vendor_mozilla
CVE-2026-117906 Mozilla Foundation Security Advisory 2026-121: CVE-2026-117906
Mozilla Foundation Security Advisory 2026-121
CVE: CVE-2026-117906
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 159
Mozilla
Mozilla Foundation Security Advisory 2026-118: CVE-2026-117906
vendor_mozilla
CVE-2026-117906 Mozilla Foundation Security Advisory 2026-118: CVE-2026-117906
Mozilla Foundation Security Advisory 2026-118
CVE: CVE-2026-117906
Product: Firefox
Impact: low
Fixed in: Firefox 159
Mozilla
Mozilla Foundation Security Advisory 2026-120: CVE-2026-117906
vendor_mozilla
CVE-2026-117906 Mozilla Foundation Security Advisory 2026-120: CVE-2026-117906
Mozilla Foundation Security Advisory 2026-120
CVE: CVE-2026-117906
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.6
GHSA
Use-after-free in the CSS Parsing and Computation component.
ghsa_unreviewed·2026-10-27
CVE-2026-117906 Use-after-free in the CSS Parsing and Computation component.
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2079062https://www.mozilla.org/security/advisories/mfsa2026-118/https://www.mozilla.org/security/advisories/mfsa2026-119/https://www.mozilla.org/security/advisories/mfsa2026-120/https://www.mozilla.org/security/advisories/mfsa2026-121/https://www.mozilla.org/security/advisories/mfsa2026-122/
2026-10-27
Published