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CVE-2026-110759                                      CPAN Security Group
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        CVE ID:  CVE-2026-110759

  Distribution:  Text-CSV_XS
      Versions:  before 1.65
      MetaCPAN:  https://metacpan.org/dist/Text-CSV_XS
      VCS Repo:  https://github.com/cpan-authors/Text-CSV_XS

Text::CSV_XS versions before 1.65 for Perl return a 0xFF byte that is
not in the input for an empty last field followed by a lone CR in parse

Description
-----------
Text::CSV_XS versions before 1.65 for Perl return a 0xFF byte that is
not in the input for an empty last field followed by a lone CR in
parse.

When the input to parse ends in a separator and a lone CR, the parser
treats the end of the input as the next character and stores the
end-of-file marker in the field as the byte 0xFF. With binary set,
parse("a,\r") returns the fields "a" and "\xFF". On UTF-8 flagged input
the last field is a UTF-8 flagged string holding that lone byte, which
is malformed UTF-8. The same input with a non-empty last field is
rejected as an error.

A CRLF file read line by line and chomped ends this way when its last
column is empty, so the application receives a byte that is not in its
input.

Problem types
-------------
- CWE-1286 Improper Validation of Syntactic Correctness of Input

Solutions
---------
Upgrade to Text-CSV_XS 1.65 or later.

References
----------
https://github.com/cpan-authors/Text-CSV_XS/commit/7627f1a2bb8ffe4e81d9847318a060822043f7f3.patch
https://metacpan.org/release/HMBRAND/Text-CSV_XS-1.65/changes

Timeline
--------
- 2026-10-14: Fix committed to upstream repository.
- 2026-10-15: Version 1.65 released with fix.