CVE-2026-117861

Impact

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

References

• NVD record
• CVE.org record
• https://bugzilla.mozilla.org/show_bug.cgi?id=2053240
• https://www.mozilla.org/security/advisories/mfsa2026-118/
• https://www.mozilla.org/security/advisories/mfsa2026-120/
• https://www.mozilla.org/security/advisories/mfsa2026-121/
• https://www.mozilla.org/security/advisories/mfsa2026-122/