{"id":"CVE-2026-53433","summary":"Denial of Service in fzf","details":"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.\n\nThis issue was fixed in version 0.73.1.","modified":"2026-07-08T08:13:42.769624540Z","published":"2026-06-30T12:01:14.407Z","database_specific":{"cwe_ids":["CWE-407"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53433.json","cna_assigner":"CERT-PL"},"references":[{"type":"ADVISORY","url":"https://cert.pl/en/posts/2026/06/CVE-2026-53432"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53433.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53433"},{"type":"REPORT","url":"https://github.com/junegunn/fzf/commit/7963a2c6586c0b9eaa89b8995de8f0e08cf8a4ce"},{"type":"PACKAGE","url":"https://github.com/junegunn/fzf"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/junegunn/fzf","events":[{"introduced":"0"},{"fixed":"ce4bef75954bebd87e0886435bcf8c6904328ab0"},{"fixed":"7963a2c6586c0b9eaa89b8995de8f0e08cf8a4ce"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.73.1"}],"cpe":"cpe:2.3:a:junegunn:fzf:*:*:*:*:*:*:*:*","source":["CPE_RANGE","REFERENCES"]}}],"versions":["v0.73.0","v0.72.0","v0.71.0","v0.70.0","v0.68.0","v0.67.0","v0.66.1","v0.66.0","v0.65.2","v0.65.1","v0.65.0","v0.64.0","v0.63.0","v0.62.0","v0.61.3","v0.61.2","v0.61.1","v0.61.0","v0.60.3","v0.60.2","v0.60.1","v0.60.0","v0.59.0","v0.58.0","v0.57.0","v0.56.3","v0.56.2","v0.56.1","v0.56.0","v0.55.0","v0.54.3","v0.54.2","v0.54.1","v0.54.0","0.53.0","0.52.1","0.52.0","0.51.0","0.50.0","0.49.0","0.48.1","0.48.0","0.47.0","0.46.1","0.46.0","0.45.0","0.44.1","0.44.0","0.43.0","0.42.0","0.41.1","0.41.0","0.40.0","0.39.0","0.38.0","0.37.0","0.36.0","0.35.1","0.35.0","0.34.0","0.33.0","0.32.1","0.32.0","0.30.0","0.29.0","0.28.0","0.27.3","0.27.2","0.27.1","0.27.0","0.26.0","0.25.1","0.25.0","0.24.4","0.24.3","0.24.2","0.24.1","0.24.0-1","0.24.0","0.23.1","0.23.0","0.22.0","0.21.1","0.21.0-1","0.21.0","0.20.0","0.19.0","0.18.0","0.17.5","0.17.4","0.17.3","0.17.1","0.17.0-2","0.17.0","0.16.11","0.16.10","0.16.9","0.16.8","0.16.7","0.16.6","0.16.5","0.16.4","0.16.3","0.16.2","0.16.1","0.16.0","0.15.9","0.15.8","0.15.7","0.15.6","0.15.5","0.15.4","0.15.3","0.15.2","0.15.1","0.15.0","0.13.5","0.13.4","0.13.3","0.13.2","0.13.1","0.13.0","0.12.2","0.12.1","0.12.0","0.11.4","0.11.3","0.11.2","0.11.1","0.11.0","0.10.9","0.10.8","0.10.7","0.10.6","0.10.5","0.10.4","0.10.3","0.10.2","0.10.1","0.10.0","0.9.13","0.9.12","0.9.11","0.9.10","0.9.7-1","0.9.7","0.9.4-1","0.9.4","0.9.3","0.9.2","0.9.1","0.9.0","0.8.9","0.8.8","0.8.7","0.8.6","0.8.5","0.8.4","0.8.3","0.8.2","0.8.1","0.8.0","0.7.1","0.7.0","0.6.0","0.5.1","0.5.0","0.4.2","0.4.0","0.3.1","0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53433.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}