CVE-2026-57953
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
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.
Risk Assessment
The organization faces unauthorized modifications to operation automation configuration and EventGroups by low-privileged users, potentially leading to system disruptions or privilege escalation.
Recommendation
Immediately upgrade Mythic to version 3.4.0.60 or later, which includes the fix. Additionally, review access control configuration for automation-related endpoints.
Other vulnerabilities in Mythic
See all- 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 before 3.4.0.60 contains an authorization bypass vulnerability that allows authenticated spectator-role users to perform unauthorized write operations by accessing the eventing_import_automatic_webhook endpoint registered under spectator-permitted middleware. Attackers with spectator role can exploit this misconfigured access control to create and delete automation workflows, making unauthorized modifications to operation automation configuration and EventGroups.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS