Single-use sign-in token placed in a redirect query string in AshAuthenticationPhoenix

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81632
StatePUBLISHED
AssignerEEF
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 14:17:31 UTC
Updated2026-09-18 18:16:18 UTC
DescriptionUse 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.

Risk And Classification

Primary CVSS: v4.0 7.2 HIGH from 6b3ad84c-e1a6-4bf7-a703-f496b71e49db

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.001550000 probability, percentile 0.050360000 (date 2026-09-19)

Problem Types: CWE-598 | CWE-598 CWE-598 Use of HTTP Request With Sensitive Query String

VersionSourceTypeScoreSeverityVector
4.06b3ad84c-e1a6-4bf7-a703-f496b71e49dbSecondary7.2HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.2HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Team-alembic Ash Authentication Phoenix affected 1.7.0 2.17.4 semver Not specified
CNA Team-alembic Ash Authentication Phoenix affected 3.0.0-rc.0 3.0.0-rc.11 semver Not specified
CNA Team-alembic Ash Authentication Phoenix affected 903f3a386e1aba2f7b070187ef6f31215a92bdfd * git Not specified
CNA Team-alembic Ash Authentication affected 3.10.5 4.15.0 semver Not specified
CNA Team-alembic Ash Authentication affected 5.0.0-rc.0 5.0.0-rc.14 semver Not specified
CNA Team-alembic Ash Authentication affected eca8cadea0f1595ed2c10a0c177b1da9aa9e5269 * git Not specified

References

ReferenceSourceLinkTags
osv.dev/vulnerability/EEF-CVE-2026-81632 6b3ad84c-e1a6-4bf7-a703-f496b71e49db osv.dev
github.com/team-alembic/ash_authentication_phoenix/commit/920257d0460b9c... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
github.com/team-alembic/ash_authentication/commit/bbf345c1bb7aa28bce5dd8... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
github.com/team-alembic/ash_authentication/commit/eca8cadea0f1595ed2c10a... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
github.com/team-alembic/ash_authentication_phoenix/commit/903f3a386e1aba... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
github.com/team-alembic/ash_authentication_phoenix/security/advisories/G... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
github.com/team-alembic/ash_authentication/commit/8d8ddd25c69b669a92a701... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
github.com/team-alembic/ash_authentication_phoenix/commit/ff5ad8737748af... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
cna.erlef.org/cves/CVE-2026-81632.html 6b3ad84c-e1a6-4bf7-a703-f496b71e49db cna.erlef.org
github.com/team-alembic/ash_authentication/security/advisories/GHSA-j726... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Peter Ullrich (en)

CNA: Jonatan Männchen / EEF (en)

CNA: James Harton (en)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report