CVE-2026-8594

Name	CVE-2026-8594
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1138649

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libunicode-linebreak-perl (PTS)	bookworm, bullseye, trixie	0.0.20190101-1	vulnerable
	forky, sid	0.0.20190101-3	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libunicode-linebreak-perl	source	(unstable)	(unfixed)			1138649

Notes

[trixie] - libunicode-linebreak-perl <no-dsa> (Minor issue)
[bookworm] - libunicode-linebreak-perl <no-dsa> (Minor issue)
[bullseye] - libunicode-linebreak-perl <postponed> (Minor issue)
https://lists.security.metacpan.org/cve-announce/msg/40542383/
Patch: https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch