Is CVE-2026-111274 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-111274?

CVE-2026-111274 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-111274

Description

unarr through 1.1.1 contains a heap-based out-of-bounds read in zip_parse_extra_fields() in zip/parse-zip.c due to an incorrect ZIP64 extra field length check. Attackers can supply a crafted ZIP archive with 0xFFFFFFFF sentinel values and a truncated ZIP64 record to read past the heap buffer and crash the process.