In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri…
Priority LOW 34CWE-601Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.
Summary
In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern ("[a-zA-Z][a-zA-Z0-9+.-]+:") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.
Why it matters now
EPSS 0.00986 62nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | oauth2-server (npm) | up to 3.1.1 | — | No fix listed | GHSA-4rg6-fm25-gc34 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- oauth2-server (npm) Vendor— Affected up to 3.1.1 Fixed in — No fix listed GHSA-4rg6-fm25-gc34
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oauth2-server_project:oauth2-server:*:*:*:*:*:node.js:*:* | up to 3.1.1 | Vulnerable | Oauth2-server Project |
- cpe:2.3:a:oauth2-server_project:oauth2-server:*:*:*:*:*:node.js:*:* Versions up to 3.1.1 Vulnerable ·Oauth2-server Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26938
- 2026-10-03 Alias added: GHSA-4rg6-fm25-gc34
References
Exploit 2
Advisory 4
More Oauth2-server Project Oauth2-server vulnerabilities
- TI-2017-14072 oauth2-server (aka node-oauth2-server) through 3.1.1 implements OAuth 2.0 without PKCE. CVSS 3.1HIGH 7.5
Sources
- CVE-2020-26938 · CVE Program
- CVE-2020-26938 · NVD
- FIRST EPSS
- GHSA-4rg6-fm25-gc34 · GitHub Advisory Database · CC BY 4.0
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