CVE-2026-49146

Description

App::Ack versions before 3.10.0 for Perl allow memory exhaustion via an unbounded context value in a project .ackrc. ack searches up the directory hierarchy from the current directory for a project .ackrc and loads its options. The -B and -C context options accepted any positive integer, and ack sized the before-context buffer to that value, so a project .ackrc setting --before-context=100000000 made ack allocate a buffer of 100 million elements. A project .ackrc committed to an untrusted repository can abort ack with an out-of-memory condition.

PUBLISHED Reserved 2026-05-27 | Published 2026-07-08 | Updated 2026-07-08 | Assigner CPANSec

Problem types

CWE-770 Allocation of Resources Without Limits or Throttling

Product status

Timeline

Credits

Michał Majchrowicz (AFINE) finder

Marcin Wyczechowski (AFINE) finder

References

github.com/...45ff5fe77dbd96f7332f31943102291f878f30b8.patch patch

metacpan.org/release/PETDANCE/ack-v3.10.0/source/Changes release-notes

cve.org (CVE-2026-49146)

nvd.nist.gov (CVE-2026-49146)

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