6.5 Medium

CVE-2026-117992 Information disclosure in the CSS Parsing and Computation component

Description

Information disclosure in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: None
Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Affected products and versions

Product	Affected versions	Fixed in
Firefox 159	earliest → < 159	159
Firefox 153.6	earliest → < 153.6	153.6
Firefox 115.44	earliest → < 115.44	115.44
Thunderbird 159	earliest → < 159	159
Thunderbird 153.6	earliest → < 153.6	153.6