PT-2026-49660 · Mozilla · Firefox

Zijie Zhao · Published 2026-06-16 · Updated 2026-06-16 · CVE-2026-12291

NVD

Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37.

Related Identifiers

CVE-2026-12291

Affected Products

Firefox

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-12291 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-58 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-57 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-59 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2036929 · Note