VULNERABILITY INTELLIGENCE

CVE-2026-53433

CVSS score7.5 HIGH
EPSS probability0.38%
CISA KEVNot currently listed
Published2026-06-30
Last modified2026-07-02
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • cvd@cert.pl: CWE-407

Primary references