CVE-2026-119764: fallo de gravedad alta en its-a-feature Mythic
Mythic 3.2.16 through 3.4.0.61 Stored XSS via Agent-Downloaded File Preview
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.4epss 0.3%
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.
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
Productos afectados
its-a-feature · MythicCVEs relacionadas — its-a-feature Mythic
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-57953MEDIUMMythic < 3.4.0.60 - Unauthorized Automation Workflow Modification via eventing_import_automatic_webhook EndpointEPSS 0.4%CVE-2026-57951HIGHMythic < 3.4.0.60 - Broken Permission Filter in payload_build_step TableEPSS 0.4%CVE-2026-57952MEDIUMMythic < 3.4.0.60 - Unauthorized C2 Profile Configuration Access via Unverified Payload UUIDEPSS 0.3%
Referencias
https://github.com/h00die/mythic_xsshttps://github.com/its-a-feature/Mythichttps://github.com/its-a-feature/Mythic/blob/33a46d7db7e237458d7e20e7d3cfefef8112e590/MythicReactUI/src/components/pages/Callbacks/ResponseDisplayMedia.js#L335-L336https://github.com/its-a-feature/Mythic/commit/f06b3ed2d1de6577744cc0b3146966c625685859https://www.vulncheck.com/advisories/mythic-3.2.16-through-3.4.0.61-stored-xss-via-agent-downloaded-file-preview