CVE-2026-57953

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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-863

Published

2026-06-29

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• its-a-feature:mythic

References

• https://github.com/its-a-feature/Mythic/commit/82648e8241b800a32e1882afc310e7316d98ebaa
• https://github.com/its-a-feature/Mythic/issues/565
• https://github.com/its-a-feature/Mythic/releases/tag/v3.4.0.60
• https://www.vulncheck.com/advisories/mythic-unauthorized-automation-workflow-modification-via-eventing-import-automatic-webhook-endpoint

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