CVE-2026-41213
5.9 · MEDIUMOverview
CVE-2026-41213 is a medium-severity vulnerability affecting node-oauth node-oauth\/oauth2-server. It was published on April 23, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
@node-oauth/oauth2-server is a module for implementing an OAuth2 server in Node.js. The token exchange path accepts RFC7636-invalid code_verifier values (including one-character strings) for S256 PKCE flows. Because short/weak verifiers are accepted and failed verifier attempts do not consume the authorization code, an attacker who intercepts an authorization code can brute-force code_verifier guesses online until token issuance succeeds.
Remediation
Check the references section for vendor advisories and patches from node-oauth. Update node-oauth\/oauth2-server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| node-oauth | node-oauth\/oauth2-server | >= 0, < 5.3.0 | Affected |
Frequently Asked Questions
What is CVE-2026-41213?
CVE-2026-41213 is a medium-severity vulnerability affecting node-oauth node-oauth\/oauth2-server. It was published on April 23, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2026-41213?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-41213?
Check the references section for vendor advisories and patches from node-oauth. Update node-oauth\/oauth2-server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-41213?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-41213 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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