CVE-2026-110755

Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline. With eol unset, the default, getline reads with Perl's default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size. A reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cpan-authors/Text-CSV_XS/commit/f25e00aacd6fc15857b22487cb2e5ca263f377e0.patch
https://metacpan.org/release/HMBRAND/Text-CSV_XS-1.65/changes

Configurations

No configuration.

History

20 Oct 2026, 19:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

16 Oct 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 23:17

Updated : 2026-10-20 19:17

NVD link : CVE-2026-110755

Mitre link : CVE-2026-110755

CVE.ORG link : CVE-2026-110755

JSON object : View

Products Affected

No product.

CWE

CWE-407

Inefficient Algorithmic Complexity

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