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TI-2026-56728 Aliases CVE-2026-82263GHSA-2c8c-r4jf-gp34

Logto Server-Side Request Forgery via OIDC SSO Connector Issuer URL

Priority HIGH 69CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00459 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
logto-iologtoup to 1.42.0—No fix listedCNA
  • logto Vendorlogto-io Affected up to 1.42.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82263
  2. 2026-10-03 Alias added: GHSA-2c8c-r4jf-gp34

References

Patch 1

Other 3

  • TI-2026-44494 Logto: ReDoS via unescaped user input in email subaddressing regex (blockSubaddressing) CVSS 3.1HIGH 7.5
  • TI-2026-40275 XML injection in logto-io logto CVSS 3.1HIGH 8.5
  • TI-2026-39955 Logto: Account Center MFA management step-up bypass via WebAuthn registration verification CVSS 3.1HIGH 8.1
  • TI-2026-45089 Logto: Account API can disclose stored third-party provider tokens without the identities scope CVSS 3.1HIGH 7.6
  • TI-2026-45086 Logto: OS command injection vulnerability exists in the Commitlint workflow CVSS 3.1MEDIUM 6.3
  • TI-2026-45087 logto-tunnel serves files outside --experience-path via path traversal CVSS 4.0HIGH 8.7
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences