{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"its-a-feature/Mythic","product":"Mythic","source":"CNA: VulnCheck","vendor":"its-a-feature","versions":[{"lessThanOrEqual":"3.4.0.61","status":"affected","version":"3.2.16","versionType":"custom"}]}],"cveId":"CVE-2026-119764","cwes":["CWE-79"],"description":"Mythic 3.2.16 through 3.4.0.61 contains a stored cross-site scripting vulnerability that allows attackers controlling target endpoint files to run JavaScript in the Mythic UI origin by planting HTML in .pdf-named files. When an operator downloads the file and clicks Preview Media, content-sniffed HTML from /direct/view renders same-origin, stealing localStorage JWTs for full GraphQL and REST access.","epss":{"date":"2026-11-04","percentile":0.2474,"score":0.00317},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/h00die/mythic_xss"}],"kev":null,"metrics":[{"score":7.4,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"}],"modifiedAt":1793845630275,"publishedAt":1793380795892,"references":[{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://github.com/h00die/mythic_xss"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/its-a-feature/Mythic/commit/f06b3ed2d1de6577744cc0b3146966c625685859"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/its-a-feature/Mythic/blob/33a46d7db7e237458d7e20e7d3cfefef8112e590/MythicReactUI/src/components/pages/Callbacks/ResponseDisplayMedia.js#L335-L336"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/its-a-feature/Mythic"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/mythic-3.2.16-through-3.4.0.61-stored-xss-via-agent-downloaded-file-preview"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/h00die/mythic_xss"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/its-a-feature/Mythic/commit/f06b3ed2d1de6577744cc0b3146966c625685859"}],"revision":"4d9639e32831ee1712a4db1b134f86789517870090f65fdc3e1b32ac0c34c7b1","sources":[{"modifiedAt":1793845630275,"name":"CNA: VulnCheck","retrievedAt":1793848134808,"url":"https://www.cve.org/CVERecord?id=CVE-2026-119764"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793848153263,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-119764"}],"ssvc":{"assessedAt":1793845608229,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Mythic 3.2.16 through 3.4.0.61 Stored XSS via Agent-Downloaded File Preview","updatedAt":1793848153263}