CVE-2026-111274
unarr through 1.1.1 Heap Out-of-Bounds Read via zip_parse_extra_fields
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | selmf |
| Product | unarr |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
selmf / unarr
0 ≤ 1.1.1
References
hackmd.io: https://hackmd.io/@haind-pwn/unarr-tar-zip-oob github.com: https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/zip/parse-zip.c#L48-L72 github.com: https://github.com/selmf/unarr vulncheck.com: https://www.vulncheck.com/advisories/unarr-through-1.1.1-heap-out-of-bounds-read-via-zip-parse-extra-fields
Credits
HaiND from the Post and Telecommunication Institute of Technology