CVE-2026-92027

high

Description

Use-after-free in the DOM: Streams component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

References

https://www.mozilla.org/security/advisories/mfsa2026-96/

https://www.mozilla.org/security/advisories/mfsa2026-95/

https://www.mozilla.org/security/advisories/mfsa2026-94/

https://www.mozilla.org/security/advisories/mfsa2026-93/

https://www.mozilla.org/security/advisories/mfsa2026-92/

https://www.mozilla.org/security/advisories/mfsa2026-91/

https://www.mozilla.org/security/advisories/mfsa2026-90/

https://bugzilla.mozilla.org/show_bug.cgi?id=2068433

Details

Source: Mitre, NVD

Published: 2026-09-15

Updated: 2026-09-16

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00156

Detections

Analytics