Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters

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Summary

CVECVE-2026-8594
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-30 16:17:05 UTC
Updated2026-05-30 16:17:05 UTC
DescriptionText::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters. Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment. A side effect of this is that the full input can be duplicated for each segment. Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service. Note that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.

Risk And Classification

Problem Types: CWE-405 | CWE-407 | CWE-405 CWE-405 Asymmetric Resource Consumption (Amplification) | CWE-407 CWE-407 Inefficient Algorithmic Complexity

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA NEZUMI TextLineFold affected 2019.001 custom Not specified

References

ReferenceSourceLinkTags
security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch 9b29abf9-4ab0-4765-b253-1875cd9b441e security.metacpan.org
metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/Lin... 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
github.com/hatukanezumi/Unicode-LineBreak/pull/6 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Workarounds

CNA: Apply the patch.

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