firefox-esr: Use-after-free in the DOM: HTML Parser component
CVE-2026-117883 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-117883, released October 29, 2026. It is not reported as exploited. Patch Radar priority: High.
Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| firefox · ol 10 | 0:153.6.0-1.0.1.el10_2 | ELSA-2026-93956 | Nov 7, 2026 |
| firefox · ol 8 | 0:153.6.0-1.0.1.el8_10 | ELSA-2026-94405 | Nov 7, 2026 |
| firefox · ol 9 | 0:153.6.0-1.0.1.el9_8 | ELSA-2026-93957 | Nov 7, 2026 |
| firefox-esr · Debian 12.15 (bookworm) | 153.6.0esr-1~deb12u2 | DEBIAN-CVE-2026-117883 | Oct 29, 2026 |
| firefox-esr · Debian 13.5 (trixie) | 153.6.0esr-1~deb13u1 | DEBIAN-CVE-2026-117883 | Oct 29, 2026 |
| firefox-x11 · ol 9 | 0:153.6.0-1.0.1.el9_8 | ELSA-2026-93957 | Nov 7, 2026 |
| thunderbird · Debian 12.15 (bookworm) | 1:153.6.0esr-1~deb12u2 | DEBIAN-CVE-2026-117883 | Oct 29, 2026 |
| thunderbird · Debian 13.5 (trixie) | 1:153.6.0esr-1~deb13u1 | DEBIAN-CVE-2026-117883 | Oct 29, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.