CVE-2026-110752: Text::CSV_XS memory exhaustion in RFC 7111 fragment parsing

CVE-2026-110752 · Severity: info · Published 2026-10-16

Text::CSV_XS is a Perl library for parsing and generating CSV files. An attacker can supply a crafted RFC 7111 fragment selector (like row=1-400000000) to the fragment() function, causing the library to allocate massive amounts of memory and crash the application with an out-of-memory error that cannot be caught by error handlers.

Technologies: CPAN Text::CSV XS. Vendors: CPAN.

Quick answers

Is CVE-2026-110752 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-110752 being exploited in the wild.
How severe is CVE-2026-110752?
Informational severity, published 16 October 2026.
Which products and versions are affected?
CPAN Text::CSV XS before 1.65.
Is there a fix for CVE-2026-110752?
Yes: fixed in 1.65. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-110752 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-110752?
Check whether you run CPAN Text::CSV XS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 1.65

Technical details

The vulnerability is a denial-of-service via algorithmic complexity: the fragment() function pre-allocates an array with one entry per index in a row= or col= range selector before reading any data, without clamping the range to actual data size. An attacker-controlled RFC 7111 fragment parameter allows arbitrary range values, so row=1-400000000 on a small file causes ~33 bytes per index allocation (~1.3 GB for this example). The fix changes the implementation to store ranges as [from, to] pairs and test membership on-the-fly, eliminating memory allocation proportional to selector integers.

Affected products

  • cpan Text::CSV_XS before 1.65

Timeline

  • 2026-10-16: disclosed
  • 2026-10-14: patched

References

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