CVE-2026-0881

Summary

Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

firefox: Sandbox escape in the Messaging System component

Additional References

• https://access.redhat.com/security/cve/CVE-2026-0881
• https://bugzilla.redhat.com/show_bug.cgi?id=2428970
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0881.json

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2005845
• https://www.mozilla.org/security/advisories/mfsa2026-01/
• https://www.mozilla.org/security/advisories/mfsa2026-04/

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