Buffer overflow in Mozilla Firefox and Firefox for Android - CVE-2026-6784
Published: April 21, 2026
Vulnerability identifier: #VU126689
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-6784
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to memory corruption in multiple components when processing web content. A remote attacker can trigger memory corruption to execute arbitrary code.
Some of these bugs showed evidence of memory corruption.
Remediation
Install security update from vendor's website.
External links
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-30/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1536243
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1745382
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1851073
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1893400
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1963301
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2001319
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2002899
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2012436
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2014435
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2016901
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2019916
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2020486
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2020612
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2020817
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021788
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022051
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022367
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022431
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2023302
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2023670
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024225
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024238
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024240
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024265
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024367
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024369
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024424
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024760
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025281
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025361
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025387
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025466
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025954
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025958
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2026278
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2026292
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2026297
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2026378
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027148
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027287
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027341
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027384
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027427
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027694
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027993
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028009
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028270
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028416
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028524
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029295
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029301
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029461
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029699
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029800
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029801