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Fencer Vulns
critical 9.8

CVE-2026-110759 json

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

published 2026-10-16 23 d ago modified 2026-10-20 19 d ago also EUVD-2026-103199

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

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.

Patch / fix

  • libtext-csv-xs-perl Debian 14 1.65-1

debian advisories DEBIAN-CVE-2026-110759

  • perl-Text-CSV_XS SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 1.34-150000.3.6.1

suse advisories SUSE-SU-2026:5120-1

  • perl-Text-CSV_XS openSUSE Tumbleweed 1.650.0-1.1

opensuse advisories openSUSE-SU-2026:12218-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-110759 updated cvss 6.5

perl-text-csv_xs: Text::CSV_XS: Data corruption via trailing carriage return in empty fields

  • Red Hat Enterprise Linux 7 perl-Text-CSV_XS 1.62-1.el10_2 Red Hat Enterprise Linux 9 perl-Text-CSV_XS 1.62-1.el10_2 Red Hat Enterprise Linux 10 perl-Text-CSV_XS 1.62-1.el10_2
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
19 d ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness
  • CWE-1286 Improper Validation of Syntactic Correctness of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.