CVE-2026-48959 – IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward

CVE ID :CVE-2026-48959

Published : May 27, 2026, 4:16 a.m. | 15 minutes ago

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.

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…