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01 Record

CVE-2026-53513

Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration

CriticalPUBLISHEDCNA: GitHub_M
CNA base score9.6 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
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02 Description

Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.24% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 15.9% of scored records. A rank, not a probability.
NVD base score
9.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-07-21.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-15 17:15Z3 MO AGO
Last updated
2026-07-15 19:29Z3 MO AGO
Reserved
2026-06-09
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Critical (CVSS 9.6)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Weaknesses
  • CWE-20Improper Input ValidationClass
  • CWE-345Insufficient Verification of Data AuthenticityClass
  • CWE-441Unintended Proxy or Intermediary ('Confused Deputy')Class
  • CWE-918Server-Side Request Forgery (SSRF)Base
Data version
5.2
Document digest
69d23ace7e73f60bab88e7af96826bdae93fcfd961911b4ede765d948a5c5df2

05 Affected products

VendorProductVersionsPlatforms
better-authbetter-auth>= 0.1.0, < 1.6.11—
@better-authsso>= 0.1.0, < 1.6.11—

06 References