CVE-2026-53658
Fabric CA: LDAP Injection via Unescaped Username in GetUser Filter
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-90 |
| Vendor | hyperledger |
| Product | fabric-ca |
| Published | Sep 15, 2026 |
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Affected Versions
hyperledger / fabric-ca
< 1.5.21
References
github.com: https://github.com/hyperledger/fabric-ca/security/advisories/GHSA-xghw-p77p-3r7x github.com: https://github.com/hyperledger/fabric-ca/pull/501 github.com: https://github.com/hyperledger/fabric-ca/commit/d379df823534d56dec0166a6da8f0415e3beee24 github.com: https://github.com/hyperledger/fabric-ca/releases/tag/v1.5.21