CVE-2026-81632
Description
Use of HTTP Request With Sensitive Query String vulnerability in team-alembic AshAuthenticationPhoenix allows someone able to read access logs, proxy logs or browser history to recover a single-use sign-in token and authenticate as its owner. After a successful password sign-in, AshAuthentication.Phoenix.Components.Password.SignInForm builds the sign_in_with_token path with the freshly issued user.__metadata__.token as a query parameter and redirects the browser to it with a GET. The token therefore travels in the request line, where web servers, reverse proxies, request telemetry and the browser's own history record it, all of which outlive the request and are ordinarily less protected than session storage. The redirect destination is restricted to a local path, so this is not an open redirect; the exposure is the retention of a live credential. This issue affects ash_authentication_phoenix: from 1.7.0 before 2.17.4 and from 3.0.0-rc.0 before 3.0.0-rc.11; ash_authentication: from 3.10.5 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://cna.erlef.org/cves/CVE-2026-81632.html
- https://github.com/team-alembic/ash_authentication/commit/8d8ddd25c69b669a92a701af74bff42e1aada998
- https://github.com/team-alembic/ash_authentication/commit/bbf345c1bb7aa28bce5dd856ac0ed2427f103859
- https://github.com/team-alembic/ash_authentication/commit/eca8cadea0f1595ed2c10a0c177b1da9aa9e5269
- https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-j726-59hm-r46r
- https://github.com/team-alembic/ash_authentication_phoenix/commit/903f3a386e1aba2f7b070187ef6f31215a92bdfd
- https://github.com/team-alembic/ash_authentication_phoenix/commit/920257d0460b9c7cbb42a83d0888c10f4eeeb88a
- https://github.com/team-alembic/ash_authentication_phoenix/commit/ff5ad8737748afed9cdfde3ec3a05b8a4702a742
- https://github.com/team-alembic/ash_authentication_phoenix/security/advisories/GHSA-8jh5-339h-mqx9
- https://osv.dev/vulnerability/EEF-CVE-2026-81632
CWEs
CWE-598
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.