CVE-2026-117920
Use-after-free in the DOM: HTML Parser component
- Risk score
- 64/100
- CVSS
- 9.6 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: HTML Parser component. This vulnerability was fixed in Firefox 159, 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 Amber
- CVSS 9.6 critical
- Remotely exploitable without logging in
References
Original description
Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Last activity 27 Oct 2026. Patch Forecast updates every hour.