Private-network data disclosure via unvalidated OIDC issuer
Published Aug 28, 2026 · Updated Aug 28, 2026
SSRF in Logto 1.42.0 and earlier allows remote authenticated users to read private-network responses through an OIDC issuer URL. The OIDC connector creation path passes the unvalidated issuer to fetchOidcConfigRaw, which appends the discovery path and performs an HTTP GET. Tenant-administrator Management API credentials are required, and returned response bodies expose data from services reachable by the Logto server.
Summary
What happened
SSRF in Logto 1.42.0 and earlier allows remote authenticated users to read private-network responses through an OIDC issuer URL. The OIDC connector creation path passes the unvalidated issuer to fetchOidcConfigRaw, which appends the discovery path and performs an HTTP GET. Tenant-administrator Management API credentials are required, and returned response bodies expose data from services reachable by the Logto server.
The record
- CVE
- CVE-2026-82263
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- Logto
- Product
- Logto
- Classifications
- CWE-918, CAPEC-664, T1552.005
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.42.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- OIDC SSO connector SSRF proof of conceptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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