Authorization Bypass Through User-Controlled Key vulnerability in team-alembic ashauthentication allows a user with an account to install a…
CVE-2026-119215
Authorization Bypass Through User-Controlled Key vulnerability in team-alembic ashauthentication allows a user with an account to install a TOTP secret they control on another user's account, and then sign in as that user or hold their second factor. AshAuthentication.Strategy.Totp.ConfirmSetupChange verified a setup token but did not check that it was issued to the record being confirmed, so an attacker's own pending secret could be confirmed onto another user's record. The TOTP setup changes, ConfirmSetupChange, GeneratePendingSetupChange and GenerateSecretChange, also marked their changesets as AshAuthentication interactions, which the standard AshAuthenticationInteraction policy bypass lets through. A policy limiting setup and confirmsetup to the actor's own record therefore never ran when an application exposed those actions by record key, and a direct setup call on another user's record returned that user's pending secret and setup token. This issue affects ashauthentication: from 5.0.0-rc.0 before 5.0.0-rc.16.
Assessment
- CVSS
- 7.6 (v4.0)
- Severity
- High
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 3 November 2026
- Last updated
- 3 November 2026
- Affected
- team-alembic · ash_authentication
- Assigner
- EEF
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
At the source
References
- https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-gx67-694c-655c
- https://cna.erlef.org/cves/CVE-2026-119215.html
- https://osv.dev/vulnerability/EEF-CVE-2026-119215
- https://github.com/team-alembic/ash_authentication/commit/6e7a880698614887527a87df206b4eb0c0fbd8c1
- https://github.com/team-alembic/ash_authentication/commit/4058be0f519c2e9b0d2266e90f9c7d8547d54574
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