7.5 CVE-2026-48959

Enriched by CISA
 

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.
https://nvd.nist.gov/vuln/detail/CVE-2026-48959

Categories

CWE-407 : Inefficient Algorithmic Complexity
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. Used when the algorithmic complexity is related to the square of the number of inputs (N^2) C++ library for image metadata has "quadratic complexity" issue with unnecessarily repetitive parsing each time an invalid character is encountered Python has "quadratic complexity" issue when converting string to int with many digits in unexpected bases server allows ReDOS with crafted User-Agent strings, due to overlapping capture groups that cause excessive backtracking. Perl-based email address parser has "quadratic complexity" issue via a string that does not contain a valid address CPU consumption via inputs that cause many hash table collisions. CPU consumption via inputs that cause many hash table collisions. Product performs unnecessary processing before dropping an invalid packet. CPU and memory consumption using many wildcards. Product allows attackers to cause multiple copies of a program to be loaded more quickly than the program can detect that other copies are running, then exit. This type of error should probably have its own category, where teardown takes more time than initialization. Network monitoring system allows remote attackers to cause a denial of service (CPU consumption and detection outage) via crafted network traffic, aka a "backtracking attack." Wiki allows remote attackers to cause a denial of service (CPU consumption) by performing a diff between large, crafted pages that trigger the worst case algorithmic complexity. Wiki allows remote attackers to cause a denial of service (CPU consumption) by performing a diff between large, crafted pages that trigger the worst case algorithmic complexity. OS allows attackers to cause a denial of service (CPU consumption) via crafted Gregorian dates. Memory leak by performing actions faster than the software can clear them.

References


 

AFFECTED (from MITRE)

Vendor Product Versions
PMQS IO::Uncompress::Unzip
  • < 2.220 [affected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end

REMEDIATION


EXPLOITS

Exploit-db.com

id description date
No known exploits

POC Github

Url
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Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id description severity
No entry