{"schema":"threatline.record/2","record":{"id":"CVE-2026-53433","aliases":["GHSA-mvmf-94v6-879g","GO-2026-6620"],"summary":"fzf vulnerable to denial of service through quadratic HTTP request-body accumulation","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.","categories":["Libraries & packages"],"product":"github.com/junegunn/fzf","vendor":"fzf","ecosystem":"go","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-mvmf-94v6-879g","source_modified_at":"2026-09-30T23:52:48Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"go","name":"github.com/junegunn/fzf"},"range":"< 0.73.1"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-53433","source_modified_at":"2026-06-30T13:32:52.251Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"fzf","vendor":"fzf","versions":[{"lessThan":"0.73.1","status":"affected","version":"0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-mvmf-94v6-879g","source_modified_at":"2026-10-01T20:56:21.610832605Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"github.com/junegunn/fzf","ecosystem":"Go","purl":"pkg:golang/github.com/junegunn/fzf"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.73.1"}]}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-mvmf-94v6-879g","source_modified_at":"2026-09-30T23:52:48Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"go","name":"github.com/junegunn/fzf"},"version":"0.73.1"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-53433","source_modified_at":"2026-06-30T13:32:52.251Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"fzf","ecosystem":null},"version":"0.73.1","basis":"first unaffected version stated in the CVE record"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-mvmf-94v6-879g","source_modified_at":"2026-10-01T20:56:21.610832605Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"github.com/junegunn/fzf","ecosystem":"Go","purl":"pkg:golang/github.com/junegunn/fzf"},"version":"0.73.1"}],"cvss":5.7,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00378,"percentile":0.30607,"score_date":"2026-10-23"},"published_at":"2026-06-30T12:01:14.407Z","modified_at":"2026-10-01T20:56:21.610832605Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-mvmf-94v6-879g","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-09-30T23:52:48Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-53433","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-06-30T13:32:52.251Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-mvmf-94v6-879g","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-01T20:56:21.610832605Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-53433","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53433","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/junegunn/fzf/commit/7963a2c6586c0b9eaa89b8995de8f0e08cf8a4ce","tags":["issue-tracking"]},{"source":"CVE List","url":"https://cert.pl/en/posts/2026/06/CVE-2026-53432","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://github.com/junegunn/fzf","tags":["product"]},{"url":"https://github.com/junegunn/fzf/releases/tag/v0.73.1","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-mvmf-94v6-879g","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-06-30T13:32:32.210950Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-01T20:56:21.610832605Z","content_hash":"76356a4b15e6207272047027879c13468e9d008d6bcbe51fd64f5b1e0a6dff1b"}}