PT-2026-97856 · Logto · Logto
CVE-2026-56739
·
Published
2026-09-24
·
Updated
2026-09-28
CVSS v4.0
8.5
High
| Vector | AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
Logto versions prior to 1.43.0
Description
Logto fails to validate addresses used for outbound connections controlled by administrators. This allows requests to reach special-use and cloud metadata addresses via webhook delivery in
packages/core/src/libraries/hook/utils.ts. Additionally, custom OAuth2 connectors may use an attacker-selected userInfoEndpoint to forward OAuth access tokens in the Authorization header, and OIDC connectors may fetch an attacker-selected jwksUri. These operations require tenant administrative configuration access and can cross the server network boundary, potentially exposing internal data or upstream provider credentials.Recommendations
Update to version 1.43.0.
Exploit
Fix
SSRF
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Weakness Enumeration
Related Identifiers
Affected Products
Logto