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.
Published: 2026-10-22
Score: 2 Low
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Thu, 22 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents
First Time appeared Junegunn
Junegunn fzf
Weaknesses CWE-407
CPEs cpe:2.3:a:junegunn:fzf:*:*:*:*:*:*:*:*
Vendors & Products Junegunn
Junegunn fzf
References
Metrics cvssV3_1

{'score': 2.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 2, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-22T10:57:40.288Z

Reserved: 2026-10-22T10:11:36.987Z

Link: CVE-2026-115319

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-22T11:17:50.677

Modified: 2026-10-22T11:17:50.677

Link: CVE-2026-115319

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T13:15:06Z

Weaknesses
  • CWE-407

    Inefficient Algorithmic Complexity