CVE-2026-117864
MozillaFirefox: Sandbox escape in the Form Manager component.
CVE-2026-117864 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2026-117864, released October 29, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.8
IMPORTANT
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0039
33rd percentile
Sandbox escape in the Form Manager component.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| MozillaFirefox · sles 15.6 | 153.6.0-150400.157.19.1 | SUSE-SU-2026:5145-1 | Nov 7, 2026 |
| MozillaFirefox · sles 15.7 | 153.6.0-150400.157.19.1 | SUSE-SU-2026:5145-1 | Nov 7, 2026 |
| 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-2026-117864 | Oct 29, 2026 |
| firefox-esr · Debian 13.5 (trixie) | 153.6.0esr-1~deb13u1 | DEBIAN-CVE-2026-117864 | 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-2026-117864 | Oct 29, 2026 |
| thunderbird · Debian 13.5 (trixie) | 1:153.6.0esr-1~deb13u1 | DEBIAN-CVE-2026-117864 | Oct 29, 2026 |
| thunderbird · ol 10 | 0:153.6.0-1.0.1.el10_2 | ELSA-2026-96079 | Nov 10, 2026 |
| thunderbird · ol 9 | 0:153.6.0-1.0.1.el9_8 | ELSA-2026-96081 | Nov 10, 2026 |
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