CVE-2026-48959

Published: Mag 27, 2026 Last Modified: Mag 27, 2026
ExploitDB:
Other exploit source:
Google Dorks:

Description

AI Translation Available

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.

407

Inefficient Algorithmic Complexity

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Availability
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: Low
View CWE Details
https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86…
https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86a2ffe53a958eac6cabaf…
https://metacpan.org/release/PMQS/IO-Compress-2.220/changes
https://metacpan.org/release/PMQS/IO-Compress-2.220/changes