CVE-2026-115319 fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents

Low 2.0 Published 22 Oct 2026 Updated 29 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-115319?

CVE-2026-115319 is a low-severity vulnerability in junegunn fzf, published on 22 Oct 2026.

Official description

fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.

Weakness: CWE-407

Which versions are affected by CVE-2026-115319?

How do I fix CVE-2026-115319?

No fix has been published for CVE-2026-115319 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-115319 being exploited?

There is no known exploitation of CVE-2026-115319 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2026-115319, GHSA-9q8r-c9q4-p63h, UBUNTU-CVE-2026-115319.