CVE-2026-8958
Information disclosure, sandbox escape in the Security: Process Sandboxing component
CVSS Score
8.6
EPSS Score
0.0%
EPSS Percentile
0th
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | May 19, 2026 |
| Last Updated | May 19, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2034713 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-46/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-48/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-50/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-51/
Credits
Yaqoub Aldurayhim