CVE-2026-53513 json
Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration
published 2026-07-07 4 mo ago modified 2026-07-21 3 mo ago also GHSA-5rr4-8452-hf4v , EUVD-2026-44733
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the @better-auth/sso plugin's POST /sso/register and POST /sso/update-provider endpoints accept attacker-controlled oidcConfig.userInfoEndpoint, tokenEndpoint, and jwksEndpoint URLs when skipDiscovery: true is set, store them on the ssoProvider row without origin validation, and fetch them during OIDC callback, allowing non-blind server-side request forgery and possible account linking when trustEmailVerified: true is configured. This issue is fixed in version 1.6.11.
Patch / fix
- npm @better-auth/sso 1.6.11
- better-auth better-auth/sso 1.6.11
- better-auth better_auth 1.6.11
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| GitHub | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @better-auth/sso | >=0.1.0, <1.6.11 |
1.6.11 |
Affected products
- better-auth better-auth
- @better-auth sso
Classification
References
-
github.com
/better-auth/better-auth/pull/9574
web, issue-tracking, patch
-
github.com
/better-auth/better-auth/commit/37f60cb176cb53147da7dfd5ec15afa5b486e81e
web, patch
-
github.com
/better-auth/better-auth/security/advisories/GHSA-5rr4-8452-hf4v
web, mitigation, vendor-advisory
-
github.com
/better-auth/better-auth/releases/tag/v1.6.11
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-53513
advisory
-
github.com
/better-auth/better-auth
package
Sources
- CVE List CVE-2026-53513
- GitHub Advisory GHSA-5rr4-8452-hf4v
- NVD CVE-2026-53513
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