CVE-2026-113811: Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7 for Perl allow memory exhaustion via a never-cleared failure shift cache in search

[Robert Rothenberg <rrwo () cpansec org>]

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CVE-2026-113811                                      CPAN Security Group
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        CVE ID:  CVE-2026-113811

  Distribution:  Algorithm-UrataniTakeda
      Versions:  from 0.1.5 before 0.1.7
      MetaCPAN: https://metacpan.org/dist/Algorithm-UrataniTakeda
      VCS Repo: https://github.com/robrwo/perl-Algorithm-UrataniTakeda


Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7 for Perl
allow memory exhaustion via a never-cleared failure shift cache in
search

Description
-----------
Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7 for Perl
allow memory exhaustion via a never-cleared failure shift cache in
search.

The failure shift is cached for each pair of trie state and text
character in a field of the matcher object, and nothing clears it. A
character not seen before at a given state adds an entry that lasts for
the life of the matcher.

An attacker who can submit text with many distinct characters to a
long-lived matcher can grow its memory with each search.

Problem types
-------------
- CWE-770 Allocation of Resources Without Limits or Throttling

Solutions
---------
Upgrade to Algorithm-UrataniTakeda 0.1.7 or later.

References
----------
https://github.com/robrwo/perl-Algorithm-UrataniTakeda/security/advisories/GHSA-9vcx-647w-pr3h
https://metacpan.org/release/RRWO/Algorithm-UrataniTakeda-v0.1.7/changes
https://github.com/robrwo/perl-Algorithm-UrataniTakeda/commit/79897ef86a5a9bb6bc381718fe977c8150bc3d5b.patch