Signal is active with 3 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Mozilla released Firefox 159 and security advisories for ESR 153.6 and 115.44. Fixes include CVE-2026-117861 (sandbox escape), CVE-2026-117860 (same-origin policy bypass), privilege-escalation bugs and numerous memory-safety flaws affecting browser security boundaries. https://www.mozilla.org/en-US/security/advisories/mfsa2026-118/
Mozilla has released Firefox 159, addressing numerous security vulnerabilities rated high impact. The fixes include: • CVE-2026-117861: Sandbox escape • CVE-2026-117860: Same-origin policy bypass • Privilege escalation flaws • Numerous memory-safety bugs These affect critical browser security boundaries. Review the advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2026-118/
Firefox 159 fixes a same-origin policy bypass in DOM navigation (CVE-2026-117860), disclosed Oct 27. Origin isolation depends on the browser enforcing that boundary; web app headers cannot replace browser patching. Update Firefox. https://www.mozilla.org/en-US/security/advisories/mfsa2026-118/