{"id":"CVE-2026-115319","title":"fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents","summary":"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…","severity":"low","cvss":2.5,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-407"],"vendor":"junegunn","product":"fzf","affected":["fzf >= 0.36.0 <= 0.74.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-29T11:21:04.903260Z"},"published":"2026-10-22","updated":"2026-10-29","sourceUpdated":"2026-10-29T11:21:21.376Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115319","references":[{"url":"https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6","label":"Patch Commit"},{"url":"https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736"},{"url":"https://github.com/junegunn/fzf"},{"url":"https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents","label":"VulnCheck Advisory: fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-115319.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-115319"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-115319"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115319"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00101,"epssPercentile":0.00867,"ingestedAt":"2026-10-22T11:37:02.337Z","slug":"CVE-2026-115319","body":"## Overview\n\nfzf 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.\n\n## Affected\n\n- `fzf >= 0.36.0 <= 0.74.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-115319.json)","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":13.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}