{"id":"CVE-2026-53433","revision":"cecaa5cf60ea41bfa5a591e7e1769956","records":[{"revision":"cecaa5cf60ea41bfa5a591e7e1769956","observedAt":"2026-10-25T13:17:10.707+00:00","statement":{"source":"nvd","id":"CVE-2026-53433","aliases":[],"title":"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 craft…","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.\n\nThis issue was fixed in version 0.73.1.","state":0,"publishedAt":"2026-06-30T13:19:13.407+00:00","modifiedAt":"2026-07-02T19:01:45.227+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · cvd@cert.pl · Secondary","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":5.7,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://cert.pl/en/posts/2026/06/CVE-2026-53432","https://github.com/junegunn/fzf","https://github.com/junegunn/fzf/commit/7963a2c6586c0b9eaa89b8995de8f0e08cf8a4ce"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53433","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-407"],"productCriteria":["cpe:2.3:a:junegunn:fzf:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-06-30T13:19:13.407","lastModified":"2026-07-02T19:01:45.227"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-53433","identifiers":["CVE-2026-53433"]},"retained":false,"historicalAffected":[]}],"coverage":[]}