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NVD / CVE Program· CNA EEF

CVE-2026-81632: Single-use sign-in token placed in a redirect query string in AshAuthenticationPhoenix

HighCVSS 7.2 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: team-alembic ash_authentication 4.15.0, 5.0.0-rc.14, 8d8ddd25c69b669a92a701af74bff42e1aada998; team-alembic ash_authentication_phoenix 2.17.4, 3.0.0-rc.11, 920257d0460b9c7cbb42a83d0888c10f4eeeb88a.

Low priority for now. Upgrade to team-alembic ash_authentication 4.15.0, 5.0.0-rc.14, 8d8ddd25c69b669a92a701af74bff42e1aada998; team-alembic ash_authentication_phoenix 2.17.4, 3.0.0-rc.11, 920257d0460b9c7cbb42a83d0888c10f4eeeb88a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Sep 17, 2026
Updated
Sep 18, 2026
EPSS
0.2% · 11th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · EEF
7.2
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-81632

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (EEF). Independent of NVD's CPE analysis and usually ahead of it.

  • team-alembic ash_authentication

    • 3.10.5 and later · before 4.15.0affected · semver
    • 5.0.0-rc.0 and later · before 5.0.0-rc.14affected · semver
    • eca8cadea0f1595ed2c10a0c177b1da9aa9e5269 and lateraffected · gitfixed in bbf345c1bb7aa28bce5dd856ac0ed2427f103859, 8d8ddd25c69b669a92a701af74bff42e1aada998

  • team-alembic ash_authentication_phoenix

    • 1.7.0 and later · before 2.17.4affected · semver
    • 3.0.0-rc.0 and later · before 3.0.0-rc.11affected · semver
    • 903f3a386e1aba2f7b070187ef6f31215a92bdfd and lateraffected · gitfixed in 920257d0460b9c7cbb42a83d0888c10f4eeeb88a, ff5ad8737748afed9cdfde3ec3a05b8a4702a742

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Hexash_authenticationfrom 3.10.5 · before 4.15.04.15.0
Hexash_authenticationfrom 5.0.0-rc.0 · before 5.0.0-rc.145.0.0-rc.14
Hexash_authentication_phoenixfrom 1.7.0 · before 2.17.42.17.4
Hexash_authentication_phoenixfrom 3.0.0-rc.0 · before 3.0.0-rc.113.0.0-rc.11

Same product

team-alembic: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-4754Missing Session Revocation on Logout in ash_authentication_phoenix
    9Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
team-alembic ash_authentication4.15.0Vendor (CNA)
team-alembic ash_authentication5.0.0-rc.14Vendor (CNA)
team-alembic ash_authentication8d8ddd25c69b669a92a701af74bff42e1aada998Vendor (CNA)
team-alembic ash_authenticationbbf345c1bb7aa28bce5dd856ac0ed2427f103859Vendor (CNA)
team-alembic ash_authentication_phoenix2.17.4Vendor (CNA)
team-alembic ash_authentication_phoenix3.0.0-rc.11Vendor (CNA)
team-alembic ash_authentication_phoenix920257d0460b9c7cbb42a83d0888c10f4eeeb88aVendor (CNA)
team-alembic ash_authentication_phoenixff5ad8737748afed9cdfde3ec3a05b8a4702a742Vendor (CNA)
Hex:ash_authentication4.15.0Package registry (OSV)
Hex:ash_authentication5.0.0-rc.14Package registry (OSV)
Hex:ash_authentication_phoenix2.17.4Package registry (OSV)
Hex:ash_authentication_phoenix3.0.0-rc.11Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Not on record for this CVE: variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-598 · Use of HTTP Request With Sensitive Query String

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records