Algorithmic Complexity Affecting fzf package, versions <0.73.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-FZF-17750762
- published1 Jul 2026
- disclosed30 Jun 2026
Introduced: 30 Jun 2026
CVE-2026-53433 (opens in a new tab)How to fix?
Upgrade Debian:14 fzf to version 0.73.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream fzf package and not the fzf package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.