CVE-2026-115319
Low
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.
SeverityLow
CVSS2.5
Exploit probability1. percentile0.1%
ProductJunegunn Fzf
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-407CWE-407
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| junegunn fzf | 0.36.0 ≤ v ≤ 0.74.5 | — |
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