CVE-2026-116740

EUVD-2026-110488
libcss through 0.9.2 contains a NULL pointer dereference vulnerability in mq_parse_media_query() that allows remote attackers to crash consumers by supplying media lists ending in a comma. Attackers can serve a stylesheet whose @media or @import media list has a trailing comma, causing NetSurf or other parsers to crash.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 25.66%
Common Weakness Enumeration
References
https://github.com/netsurf-browser/libcss
https://github.com/netsurf-browser/libcss/blob/release/0.9.2/src/parse/mq.c#L984
https://github.com/netsurf-browser/libcss/commit/006ffc4096040da13690abc380e5f828ec08284d
https://hackmd.io/@haindpwn/libcss-media-list-null-deref
https://www.vulncheck.com/advisories/libcss-through-0.9.2-null-pointer-dereference-via-media-query-parser