{"id":"CVE-2026-115319","aliases":["DEBIAN-CVE-2026-115319","EUVD-2026-108122","GHSA-9q8r-c9q4-p63h","UBUNTU-CVE-2026-115319"],"status":"published","title":"fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","severity":{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00101,"percentile":0.00876,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-407"],"published":"2026-10-22T10:57:40Z","modified":"2026-10-31T02:30:25Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.38.0-1","0.42.0-1","0.44.1-1","0.46.1-1","0.55.0-1","0.56.3-1","0.57.0-1","0.58.0-1","0.60.0-1","0.60.1-1","0.60.2-1","0.60.3-1","0.64.0-1","0.65.1-1","0.66.0-1","0.67.0-1","0.70.0-1","0.72.0-1","0.73.1-1","0.74.1-1","0.74.3-1","0.74.4-1","0.74.5-1"]},{"source":"osv","ecosystem":"Debian:13","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.60.3-1","0.64.0-1","0.65.1-1","0.66.0-1","0.67.0-1","0.70.0-1","0.72.0-1","0.73.1-1","0.74.1-1","0.74.3-1","0.74.4-1","0.74.5-1"]},{"source":"osv","ecosystem":"Debian:14","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.60.3-1","0.64.0-1","0.65.1-1","0.66.0-1","0.67.0-1","0.70.0-1","0.72.0-1","0.73.1-1","0.74.1-1","0.74.3-1","0.74.4-1","0.74.5-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.18.0-2","0.18.0-3","0.19.0-1","0.20.0-1","0.20.0-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.3-1","0.29.0-1","0.29.0-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.42.0-1build1","0.44.1-1","0.44.1-1ubuntu0.1","0.44.1-1ubuntu0.2","0.44.1-1ubuntu0.3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.67.0-1","0.72.0-1","0.73.1-1","0.74.1-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"fzf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.60.3-1","0.66.0-1","0.67.0-1"]}],"products":[{"vendor":"fzf","product":"fzf"},{"vendor":"junegunn","product":"fzf"}],"references":[{"url":"https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6","tags":["patch","fix","report"]},{"url":"https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736","tags":["technical-description","article","report"]},{"url":"https://github.com/junegunn/fzf","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115319","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9q8r-c9q4-p63h"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115319.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-115319","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-115319","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-115319","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-115319","title":"fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T10:57:40.288Z","modified":"2026-10-29T11:21:21.376Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"low","assessor":"cna"},{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T14:20:01.618694Z"}],"euvd":[{"id":"EUVD-2026-108122","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T10:57:40Z","modified":"2026-10-29T11:21:21Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-02T16:59:17.279653Z"}],"ghsa":[{"id":"GHSA-9q8r-c9q4-p63h","title":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in...","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T12:31:16Z","modified":"2026-10-22T12:31:20Z","cvss":[{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/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","level":"low"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T15:14:15.712154Z"}],"nvd":[{"id":"CVE-2026-115319","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T11:17:50.677Z","modified":"2026-10-29T12:17:10.553Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/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","level":"low","assessor":"secondary"},{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T14:13:02.724605Z"}],"osv":[{"id":"CVE-2026-115319","title":"fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T10:57:40.288Z","modified":"2026-10-31T02:30:25.727791914Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"low"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T15:44:56.675758Z"},{"id":"DEBIAN-CVE-2026-115319","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T11:17:50.677Z","modified":"2026-10-30T10:00:16.646985097Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/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","level":"low"}],"updated_at":"2026-11-02T15:45:50.923612Z"},{"id":"UBUNTU-CVE-2026-115319","description":"fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.","status":"published","published":"2026-10-22T11:17:00Z","modified":"2026-10-28T17:50:37Z","cvss":[{"version":"3.1","score":2.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-02T16:55:59.591851Z"}]}}