CVE-2026-57953: Mythic < 3.4.0.60 - Unauthorized Automation Workflow Modification via eventing_import_automatic_webhook Endpoint

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-29 · updated 2026-10-25
Weakness: CWE-863

Description

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.

Affected products

its-a-feature Mythic: before 3.4.0.60 — fixed in 3.4.0.60

How to fix

Upgrade to a fixed version: its-a-feature Mythic 3.4.0.60. Check the vendor advisory for mitigations.

References

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