ANCHORE-2025-2857

ANCHORE-2025-2857 PUBLISHED

Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. The original vulnerability was being exploited in the wild. *This only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 136.0.4, Firefox ESR < 128.8.1, and Firefox ESR < 115.21.1.

Affected Products

Vendor	Product	Versions
Mozilla	Firefox ESR	1.116, 1.116, 0
Mozilla	Firefox	0, 0, 0

Timeline

Mar 27, 2025 CVE Published
Mar 27, 2025 CVE Updated

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1956398 url
https://issues.chromium.org/issues/405143032 url
https://www.cve.org/CVERecord?id=CVE-2025-2783 url
https://www.mozilla.org/security/advisories/mfsa2025-19/ url

Open in Interactive Console →