CPANSA-Unicode-LineBreak-2026-8594: Unicode-LineBreak vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-05-30T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-05-30T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | 6.2 | Severity | |
| Original language | Language | en | |
| Also referred to | |||
Vulnerability Description
Text::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.
Vulnerabilities
CVE-2026-8594
Vulnerability 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.
| Weakness | CWE-405 : Asymmetric Resource Consumption (Amplification) |
|---|
Product status
Known affected
| Product | Score | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Unicode-LineBreak greater than 0 |
|
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-Unicode-LineBreak-2026-8594 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-unicode-linebreak-2026-8594.json - https://github.com/hatukanezumi/Unicode-LineBreak/pull/6 external
https://github.com/hatukanezumi/Unicode-LineBreak/pull/6 - https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415 external
https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415 - https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch external
https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch - http://www.openwall.com/lists/oss-security/2026/05/30/6 external
http://www.openwall.com/lists/oss-security/2026/05/30/6 - CVE-2026-8594 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-8594
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Sat May 30 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/