DEBIAN-CVE-2026-117995: Debian/firefox-esr vulnerability

Published Oct 27, 2026
·
Updated

Privilege escalation in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Affected Software

6 affected componentsFixes available
debian/firefox-esr<153.6.0esr-1~deb12u2
153.6.0esr-1~deb12u2
debian/firefox-esr<153.6.0esr-1~deb13u1
153.6.0esr-1~deb13u1
debian/firefox-esr*
debian/thunderbird*
debian/thunderbird*
debian/thunderbird*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 153.6.0esr-1~deb12u2
  2. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 153.6.0esr-1~deb13u1
  3. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 159
  4. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 153.6
  5. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 159
  6. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 153.6

Event History

Oct 27, 2026
CVE Published
via OSV·02:16 PM
Data Sourced
via OSV·02:16 PM
DescriptionAffected Software

Company

Resources

Contact

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