CVE-2026-57951 Mythic < 3.4.0.60 - Broken Permission Filter in payload_build_step Table
Authenticated users can bypass permission filters to read sensitive build step logs from all operations in the Mythic C2 framework.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57951?
CVE-2026-57951 is a high-severity missing authorization vulnerability in its-a-feature Mythic, published on 29 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mythic before 3.4.0.60 contains a broken hasura permission filter on the payload_build_step table with an always-satisfied _or condition that bypasses 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-57951?
It affects 1 product.
Products include Its-a-Feature Mythic.
How do I fix CVE-2026-57951?
No fix has been published for CVE-2026-57951 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-57951 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57951 exists.
Other vulnerabilities in its-a-feature Mythic
Sources
Also known as GHSA-9f32-pf5h-p947.