CVE-2026-110757: Text::CSV_XS versions before 1.65 for Perl allow record splitting by writing strings used as numbers without quotes in combine

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-16 · updated 2026-10-20
Weakness: CWE-116

Description

Text::CSV_XS versions before 1.65 for Perl allow record splitting by writing strings used as numbers without quotes in combine. combine and print do not check whether a field needs quotes when its value has Perl's integer or numeric flag set. Perl sets these flags on a string used in a numeric operation when it parses as a number, which allows leading and trailing whitespace. With binary set, as csv does by default, "12\n" passes a check such as $qty > 0 and is then written unquoted with its newline. A value validated as a number can end the record early and turn the fields after it into a separate row.

Affected products

Text-CSV_XS: before 1.65 — fixed in 1.65

How to fix

Upgrade to a fixed version: Text-CSV_XS 1.65. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-110757 or the next vulnerability affects your stack