What’s Vulnerable › Vulnerabilities

CVE-2026-111274: unarr through 1.1.1 Heap Out-of-Bounds Read via zip_parse_extra_fields

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-23
• Weakness: CWE-125

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.

Affected products

• selmf unarr: through 1.1.1

References

• https://github.com/selmf/unarr
• https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/zip/parse-zip.c#L48-L72
• https://hackmd.io/@haind-pwn/unarr-tar-zip-oob
• https://www.vulncheck.com/advisories/unarr-through-1.1.1-heap-out-of-bounds-read-via-zip-parse-extra-fields
• https://hackmd.io/@haind-pwn/unarr-tar-zip-oob

Get alerted when CVE-2026-111274 or the next vulnerability affects your stack