Auth bypass in Its-A-Feature Mythic
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Its-A-Feature Mythic — versions 0
Weakness classification (CWE)
References
- github.com/its-a-feature/Mythic/commit/82648e8241b800a32e1882afc310e7316d98ebaa (Patch, patch)
- github.com/its-a-feature/Mythic/issues/565 (issue-tracking, Issue Tracking)
- github.com/its-a-feature/Mythic/releases/tag/v3.4.0.60 (release-notes, Release Notes)
- www.vulncheck.com/advisories/mythic-unauthorized-automation-workflow-modificati… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-57953?
- CVE-2026-57953 is a medium-severity vulnerability in Its-A-Feature Mythic, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-06-29.
- How severe is CVE-2026-57953?
- Medium severity. CVSS v3 base score is 5.4 out of 10.