CVE-2019-9795

critical
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
9.5

Description

A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by malicious JavaScript to trigger a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-9795

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2019-9795.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201903-11

OS impact

OSVersionStatusFixed in
arch archfixed66.0-1
suse slesaffected
debian debiansidfixed66.0-1
debian debianbookwormfixed60.6.0esr-1
debian debianbullseyefixed60.6.0esr-1
debian debianforkyfixed60.6.0esr-1
debian debiantrixiefixed60.6.0esr-1

References

Verify integrity in audit chain (admin only). AS-IS.