CVE-2018-12401

critical

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

9.5

Description

Some special resource URIs will cause a non-exploitable crash if loaded with optional parameters following a '?' in the parsed string. This could lead to denial of service (DOS) attacks. This vulnerability affects Firefox < 63.

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-2018-12401

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201810-14

OS impact

OS	Version	Status	Fixed in
arch		fixed	`63.0-1`
debian	sid	fixed	`63.0-1`

References

https://security.archlinux.org/ASA-201810-14
https://security-tracker.debian.org/tracker/CVE-2018-12401

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