CVE-2026-115319

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 v3 2.5 LOW

2.5^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.0 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/junegunn/fzf
https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736
https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6
https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents

Configurations

No configuration.

History

22 Oct 2026, 11:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-22 11:17

Updated : 2026-10-29 12:17

NVD link : CVE-2026-115319

Mitre link : CVE-2026-115319

CVE.ORG link : CVE-2026-115319

JSON object : View

Products Affected

No product.

CWE

CWE-407

Inefficient Algorithmic Complexity

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