Vulnerability · Published Aug 28, 2026 · Assigned by VulnCheck
CVE-2026-82263Logto Server-Side Request Forgery via OIDC SSO Connector Issuer URL
Medium 6.8
In plain English
A medium-severity server-side request forgery in logto from logto-io. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.5%top 60.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Logto through 1.42.0 contains a server-side request forgery vulnerability in the OIDC SSO connector creation endpoint that fails to validate the issuer URL parameter. Tenant administrators with Management API credentials can supply arbitrary internal URLs to trigger HTTP GET requests to private network services, with response content returned in API responses.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
References
- GitHub Issue #9465 issue-tracking
- https://github.com/logto-io/logto product
- Vulnerable code: utils.ts technical-description
- Fix commit patch
- VulnCheck Advisory: Logto Server-Side Request Forgery via OIDC SSO Connector Issuer URL third-party-advisory