Algorithmic Complexity Affecting fzf package, versions *


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-ECHOLATEST-FZF-21692026
  • published24 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-115319  (opens in a new tab)
CWE-407  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest fzf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream fzf package and not the fzf package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1