CVE-2026-8594 Affecting libunicode-linebreak-perl package, versions <0.0.20190101-4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 May 2026
- disclosed30 May 2026
Introduced: 30 May 2026
CVE-2026-8594 (opens in a new tab)How to fix?
Upgrade Debian:14 libunicode-linebreak-perl to version 0.0.20190101-4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libunicode-linebreak-perl package and not the libunicode-linebreak-perl package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-8594
- https://github.com/hatukanezumi/Unicode-LineBreak/pull/6
- 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
- http://www.openwall.com/lists/oss-security/2026/05/30/6