Description
Improper Session Invalidation after Authentication Credential Change vulnerability in team-alembic ash_authentication allows an attacker holding a victim's session token to stay signed in after the victim resets or changes their password.
With apply_on_password_change? true, AshAuthentication.AddOn.LogOutEverywhere.Transformer adds OnPasswordChange to update actions as a global change guarded by where: changing(hashed_password). That condition is evaluated before the action's before_action hooks run, but AshAuthentication.Strategy.Password.HashPasswordChange sets the new hash in a before_action hook, so for every non-atomic password change the condition is false and the user's stored tokens are not revoked. The generated password reset action and the installer's change_password action are both non-atomic.
This issue affects ash_authentication: from 4.5.0 before 4.15.1 and from 5.0.0-rc.0 before 5.0.0-rc.16.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| team-alembic | ash_authentication | 4.5.0 – < 4.15.1, 5.0.0-rc.0 – < 5.0.0-rc.16 | 4.15.1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Hex | ash_authentication | >= 4.5.0, < 4.15.1 · >= 5.0.0-rc.0, < 5.0.0-rc.16 | 4.15.1, 5.0.0-rc.16 | EEF-CVE-2026-110826 |
References
- `log_out_everywhere` in AshAuthentication leaves sessions valid after a password reset or non-atomic password change vendor-advisory related
- EEF CNA record for CVE-2026-110826 related
- OSV record EEF-CVE-2026-110826 related
- Introducing commit 0993f94 in team-alembic/ash_authentication related
- Fix commit 954697f in team-alembic/ash_authentication patch
- Fix commit 2baef4e in team-alembic/ash_authentication patch