CVE-2026-53658Fabric CA: LDAP Injection via Unescaped Username in GetUser Filter
Updated under an hour ago ()
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It affects hyperledger fabric-ca. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-90
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
hyperledger fabric-ca hyperledger:fabric_ca (from the name) | before 1.5.21 | CNA record |
References
- https://github.com/hyperledger/fabric-ca/security/advisories/GHSA-xghw-p77p-3r7xx-refsource-confirm
- https://github.com/hyperledger/fabric-ca/pull/501x-refsource-misc
- https://github.com/hyperledger/fabric-ca/commit/d379df823534d56dec0166a6da8f0415e3beee24x-refsource-misc
- https://github.com/hyperledger/fabric-ca/releases/tag/v1.5.21x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.