CVE-2026-2807

Summary

Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

firefox: thunderbird: Memory safety bugs fixed in Firefox 148 and Thunderbird 148

Additional References

• https://access.redhat.com/security/cve/CVE-2026-2807
• https://bugzilla.redhat.com/show_bug.cgi?id=2442296
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2807.json

References

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1756056%2C1999402%2C2004872%2C2006037%2C2012855
• https://www.mozilla.org/security/advisories/mfsa2026-13/
• https://www.mozilla.org/security/advisories/mfsa2026-16/

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