CVE-2026-8594 Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters
Attackers can cause denial of service by triggering excessive resource consumption through duplicate output generation in the Text::LineFold Perl module.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-8594?
CVE-2026-8594 is a medium-severity denial of service vulnerability in NEZUMI Text::LineFold, published on 30 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-8594?
How do I fix CVE-2026-8594?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-8594 being exploited?
There is no known exploitation of CVE-2026-8594 in the wild and no public exploit code.
Sources
Also known as AZL-89297, DEBIAN-CVE-2026-8594, GHSA-xfcf-wwr2-w555, MGASA-2026-0320, UBUNTU-CVE-2026-8594.