CVE-2022-34470

CRITICAL 9.8CVE-2022-34470 · Published 22/12/2022 · updated 17/06/2026

In short

CVE-2022-34470 is a CRITICAL (CVSS 9.8) vulnerability affecting firefox (mozilla), firefox esr (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 65.4% of all vulnerabilities.
Fix: update to 102.0, 91.11 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 102.0`	`102.0`
firefox esr mozilla	`< 91.11`	`91.11`
thunderbird mozilla	`< 91.11`	`91.11`

Description

Session history navigations may have led to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

References

bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
mozilla.org/security/advisories/mfsa2022-24 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-25 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-26 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 102.0

102.0

firefox esr

mozilla

< 91.11

91.11

thunderbird

mozilla

< 91.11

91.11

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