HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-53433 — fzf is vulnerable to a Denial of Service (DoS) due to inefficient HTTP body proc...

·Source: NIST NVD

Updated:

Executive Summary

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

Analysis

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. CVSS Score: 7.5. Published: 2026-06-30T13:19:13.407.

Indicators of Compromise (1)

CVE (1)
CVE-2026-53433
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Jun 30, 2026. Verified by: NIST.

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