GHSA-7vxx-5gqr-7r44HighCVSS 7.5
IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop...
🔗 CVE IDs covered (1)
📋 Description
IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.
fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.
Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip->new($zip, Name => $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.
🔗 References (6)
- https://nvd.nist.gov/vuln/detail/CVE-2026-48959
- https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86a2ffe53a958eac6cabaf72e2.patch
- https://metacpan.org/release/PMQS/IO-Compress-2.220/changes
- http://www.openwall.com/lists/oss-security/2026/05/27/2
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://github.com/advisories/GHSA-7vxx-5gqr-7r44