CVEvulnerability

CVE-2026-53433

5.7 MEDIUM Published 2026-06-30 Modified 2026-07-02 Official page ↗
Status
Analyzed
Published
2026-06-30
Last modified
2026-07-02
Assigner
[email protected]
CVSS 4.0 ([email protected])
5.7 MEDIUM — CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-407

Description

fzf is vulnerable to a Denial of Service (DoS) due to inefficient HTTP body processing in the --listen mode due to inefficient HTTP body processing using repeated string concatenation, resulting in quadratic time complexity (O(n²)). A crafted POST request with many small segments can trigger excessive CPU usage during request handling.This allows a single malicious request to monopolize the single‑threaded HTTP server, blocking all other clients and resulting in denial of service. This issue was fixed in version 0.73.1.

Affected configurations

• junegunn fzf (< 0.73.1)

Related

Weakness · CWE (1)

  • CWE-407 Inefficient Algorithmic Complexity weakness

References