PT-2026-41900 · Mozilla · Firefox+1

Published 2026-05-19 · Updated 2026-05-19 · CVE-2026-8946

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 151 Firefox ESR versions prior to 115.36 Firefox ESR versions prior to 140.11 Thunderbird versions prior to 151 Thunderbird versions prior to 140.11

Description Incorrect boundary conditions exist in the Audio/Video: Web Codecs component.

Recommendations Update to version 151 Update to version 115.36 Update to version 140.11 Update to version 151 Update to version 140.11

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2026-8946

OPENSUSE-SU-2026:10813-1

Affected Products

Firefox

Thunderbird

References · 30

• https://nvd.nist.gov/vuln/detail/CVE-2026-8946 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-51 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-47 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10813-1 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-46 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-48 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-50 · Vendor Advisory
• https://twitter.com/infoflowcloud/status/2056871543800504434 · Twitter Post
• https://suse.com/security/cve/CVE-2026-8968 · Note
• https://suse.com/security/cve/CVE-2026-8962 · Note
• https://suse.com/security/cve/CVE-2026-8954 · Note
• https://suse.com/security/cve/CVE-2026-8401 · Note
• https://twitter.com/CVEnew/status/2056870273324916763 · Twitter Post
• https://suse.com/security/cve/CVE-2026-8957 · Note
• https://suse.com/security/cve/CVE-2026-8974 · Note