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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.

PUBLISHED Reserved 2026-06-26 | Published 2026-06-29 | Updated 2026-07-14 | Assigner VulnCheck




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

Incorrect Authorization

Product status

Default status
unaffected

Any version before 3.4.0.60
affected

Credits

George Chen finder

References

github.com/its-a-feature/Mythic/issues/563 exploit

github.com/its-a-feature/Mythic/releases/tag/v3.4.0.60 (Release Notes) release-notes

github.com/its-a-feature/Mythic/issues/563 (Researcher Disclosure) issue-tracking

github.com/...ommit/82648e8241b800a32e1882afc310e7316d98ebaa (Patch Commit) patch

www.vulncheck.com/...sion-filter-in-payload-build-step-table third-party-advisory

cve.org (CVE-2026-57951)

nvd.nist.gov (CVE-2026-57951)

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