PT-2026-43486 · Pmqs · Io::Uncompress::Unzip
Published
2026-05-27
·
Updated
2026-05-27
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CVE-2026-48959
None
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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.
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Weakness Enumeration
Related Identifiers
Affected Products
Io::Uncompress::Unzip