Is CVE-2026-116740 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116740?

CVE-2026-116740 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-116740

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.