CVE-2026-117901
Use-after-free in the DOM: Core & HTML component
- Risk score
- 60/100
- CVSS
- 8.8 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 27 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.8 high
- Remotely exploitable without logging in
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2079054
- https://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/
Original description
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Last activity 27 Oct 2026. Patch Forecast updates every hour.