CVE-2026-119764
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
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.
Risk Assessment
An attacker can hijack a Mythic operator's session and gain full access to GraphQL and REST interfaces, potentially leading to serious platform compromise.
Recommendation
Update Mythic to a version later than 3.4.0.61 and avoid previewing untrusted files in the UI.
Other vulnerabilities in Mythic
See all- CVE-2026-57953Medium
A vulnerability in Mythic before version 3.4.0.60 allows authenticated spectator-role users to bypass authorization and perform unauthorized write operations. Attackers can exploit the misconfigured eventing_import_automatic_webhook endpoint, registered under spectator-permitted middleware, to create and delete automation workflows.
- CVE-2026-57952Medium
Mythic before version 3.4.0.60 contains an authorization bypass vulnerability in four REST endpoints (c2profile_config_check_webhook, c2profile_redirect_rules_webhook, c2profile_get_ioc_webhook, c2profile_sample_message_webhook) that fail to verify payload ownership. An operator in one operation can invoke these endpoints with a known payload UUID from another operation to access that operation's C2 profile configuration including encryption keys and callback parameters.
- CVE-2026-57951Medium
A vulnerability in Mythic before version 3.4.0.60 is caused by a broken Hasura permission filter on the payload_build_step table with an always-satisfied _or condition, bypassing operation-scoped access controls. Authenticated operators and spectators can query payload_build_step to read step_stdout, step_stderr, step_name, and step_description across all operations on the server.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS