CVE-2025-67490Network attack vector

Cross-user token disclosure via incomplete cache key

Published Dec 10, 2025 · Updated Dec 11, 2025

Incorrect authorization in Auth0 Next.js SDK 4.11.0, 4.11.1, and 4.12.0 allows remote authenticated users to receive another user's token. TokenRequestCache keys in-flight access-token requests only by audience and scope, omitting request and session identity and reusing the first matching promise. A singleton Auth0Client and simultaneous requests for identical audience and scope are required; exposure can disclose a token and apply its permissions to the wrong session.

CVSS severity5.4
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Auth0 Next.js SDK 4.11.0, 4.11.1, and 4.12.0 allows remote authenticated users to receive another user's token. TokenRequestCache keys in-flight access-token requests only by audience and scope, omitting request and session identity and reusing the first matching promise. A singleton Auth0Client and simultaneous requests for identical audience and scope are required; exposure can disclose a token and apply its permissions to the wrong session.

The record

CVE
CVE-2025-67490
Published
Dec 10, 2025
Updated
Dec 11, 2025
Vendor
Auth0
Product
Auth0 Next.js SDK
Classifications
CWE-863, T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.11.0, < 4.11.2
  2. Affected versionversion=>= 4.12.0, < 4.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Auth0 · Auth0 Next.js SDKversion=>= 4.11.0, < 4.11.2; version=>= 4.12.0, < 4.12.1

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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