Vulnerability Description
Fabric CA is a Certificate Authority for Hyperledger Fabric. Prior to 1.5.21, when fabric-ca is configured with an LDAP backend, Client.GetUser in lib/server/ldap/client.go inserts the username from HTTP Basic authentication into the LDAP uid search UserFilter without escaping LDAP metacharacters. An unauthenticated attacker with network access to the CA enrollment endpoint can alter the LDAP search before password validation and potentially steer authentication attempts toward a victim account. Deployments that do not use an LDAP backend are unaffected. This issue is fixed in version 1.5.21.
Related Weaknesses (CWE)
References
- https://github.com/hyperledger/fabric-ca/commit/d379df823534d56dec0166a6da8f0415
- https://github.com/hyperledger/fabric-ca/pull/501
- https://github.com/hyperledger/fabric-ca/releases/tag/v1.5.21
- https://github.com/hyperledger/fabric-ca/security/advisories/GHSA-xghw-p77p-3r7x
FAQ
What is CVE-2026-53658?
CVE-2026-53658 is a documented vulnerability. Fabric CA is a Certificate Authority for Hyperledger Fabric. Prior to 1.5.21, when fabric-ca is configured with an LDAP backend, Client.GetUser in lib/server/ldap/client.go inserts the username from H...
How severe is CVE-2026-53658?
CVSS scoring is not yet available for CVE-2026-53658. Check NVD for updates.
Is there a patch for CVE-2026-53658?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.