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.
Metrics
Affected Vendors & Products
References
History
Tue, 30 Jun 2026 14:30:00 +0000
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Tue, 30 Jun 2026 12:30:00 +0000
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| 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. | |
| Title | Denial of Service in fzf | |
| Weaknesses | CWE-407 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: CERT-PL
Published:
Updated: 2026-06-30T13:32:52.251Z
Reserved: 2026-06-09T11:41:37.126Z
Link: CVE-2026-53433
Updated: 2026-06-30T13:32:45.588Z
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OpenCVE Enrichment
Updated: 2026-06-30T13:30:13Z