{"id":"UBUNTU-CVE-2026-115319","details":"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.","modified":"2026-10-27T04:17:44.146187094Z","published":"2026-10-26T00:00:00Z","upstream":["CVE-2026-115319"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-115319"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-115319"},{"type":"REPORT","url":"https://github.com/junegunn/fzf"},{"type":"REPORT","url":"https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736"},{"type":"REPORT","url":"https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents"}],"affected":[{"package":{"name":"fzf","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/fzf?arch=source&distro=focal"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"0.20.0-1ubuntu0.1","binary_name":"fzf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115319.json"}},{"package":{"name":"fzf","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/fzf?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.3-1","0.29.0-1","0.29.0-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"fzf","binary_version":"0.29.0-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115319.json"}},{"package":{"name":"fzf","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/fzf?arch=source&distro=noble"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"0.44.1-1ubuntu0.3","binary_name":"fzf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115319.json"}},{"package":{"name":"fzf","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/fzf?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.67.0-1","0.72.0-1","0.73.1-1","0.74.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"fzf","binary_version":"0.74.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115319.json"}},{"package":{"name":"fzf","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/fzf?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.60.3-1","0.66.0-1","0.67.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.67.0-1","binary_name":"fzf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115319.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}