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CVE-2026-7111                                        CPAN Security Group
========================================================================

        CVE ID:  CVE-2026-7111
  Distribution:  Text-CSV_XS
      Versions:  before 1.62

      MetaCPAN:  https://metacpan.org/dist/Text-CSV_XS
      VCS Repo:  https://github.com/cpan-authors/Text-CSV_XS

Text::CSV_XS versions before 1.62 for Perl have a use-after-free when
registered callbacks extend the Perl argument stack, which may enable
type confusion or memory corruption

Description
-----------
Text::CSV_XS versions before 1.62 for Perl have a use-after-free when
registered callbacks extend the Perl argument stack, which may enable
type confusion or memory corruption.

The Parse, print, getline, and getline_all methods invoke registered
callbacks (for example after_parse, before_print, or on_error) and
cache the Perl argument stack pointer across the call. If a callback
extends the argument stack enough to trigger a reallocation, the return
value is written through the stale pointer into the freed buffer, and
the caller reads the original $self argument as the return value
instead.

Calling code that expects parsed data from getline_all receives the
Text::CSV_XS object in its place, leading to logic errors or crashes.
Text::CSV_XS objects used without any registered callbacks are not
affected.

Problem types
-------------
- CWE-825 Expired Pointer Dereference
- CWE-416 Use After Free

Solutions
---------
Upgrade to 1.62 or later.

References
----------
https://github.com/cpan-authors/Text-CSV_XS/commit/c17f31a5f2bf36674748eb4b6e25672f0571a224.patch
https://metacpan.org/release/HMBRAND/Text-CSV_XS-1.62/changes

Timeline
--------
- 2026-04-25: Fix committed to public Github repository
- 2026-04-26: CVE number reserved
- 2026-04-29: Version 1.62 with the fix released to CPAN

Credits
-------
Leon Timmermans, analyst