CVE-2026-116740
libcss through 0.9.2 NULL Pointer Dereference via Media-Query Parser
netsurf-browser libcss
CVSS
7.1HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 1
- libcssaffected: all versions through 0.9.2CVE List
References 5
- github.com/netsurf-browser/libcss/commit/006ffc4096040da13690abc380e5f828ec08284dFixvia CVE List
- hackmd.io/@haindpwn/libcss-media-list-null-derefAdvisoryvia CVE List
- vulncheck.com/advisories/libcss-through-0.9.2-null-pointer-dereference-via-media-query-parserAdvisoryvia CVE List
- github.com/netsurf-browser/libcssReferencevia CVE List
- github.com/netsurf-browser/libcss/blob/release/0.9.2/src/parse/mq.c#L984Referencevia CVE List