SB20260507196 - Multiple vulnerabilities in Mozilla Firefox
Published: May 7, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2026-8093)
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to memory corruption when processing web content. A remote attacker can trigger memory corruption using specially crafted content to execute arbitrary code.
Some of the reported bugs showed evidence of memory corruption.
2) Input validation error (CVE-ID: CVE-2026-8094)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to an unspecified vulnerability in the WebRTC component. A remote attacker can trick the victim into visiting a specially crafted website and execute arbitrary code on the system.
3) Buffer overflow (CVE-ID: CVE-2026-8092)
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to memory corruption when processing web content. A remote attacker can trigger memory corruption using specially crafted content to execute arbitrary code.
Some of the reported bugs showed evidence of memory corruption.
4) Input validation error (CVE-ID: CVE-2026-8091)
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper input validation in the Audio/Video: Playback component when processing media content. A remote attacker can supply specially crafted media content to execute arbitrary code.
User interaction is required to visit a specially crafted website or open a specially crafted URL.
5) Use-after-free (CVE-ID: CVE-2026-8090)
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use-after-free in the DOM: Networking component when processing web content. A remote attacker can trigger the use-after-free with specially crafted content to execute arbitrary code.
User interaction is required to visit a specially crafted website or open a specially crafted URL.
Remediation
Install update from vendor's website.
References
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-40/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1981270
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027154
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028332
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029327
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029428
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029894
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2032189
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2034837
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2035968
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2036256
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-41/
- https://bugzilla.mozilla.org/show_bug.cgi?id=2035939
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-42/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1806249
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021977
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022576
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022722
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024439
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027883
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029463
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2030323
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2032042
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2032043
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2033270
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2033637
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2034422
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2034496
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2035879
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2036516
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-40/
- https://bugzilla.mozilla.org/show_bug.cgi?id=2029301
- https://bugzilla.mozilla.org/show_bug.cgi?id=2034352