CVE-2026-100828
Mitigation bypass in the Bookmarks & History component
- Risk score
- 65/100
- CVSS
- 9.6 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 29 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
- Affected
- Firefox
- 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
Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Last activity 29 Sep 2026. Patch Forecast updates every hour.