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Advisory record · GHSA-xghw-p77p-3r7x

Fabric CA Developer's Guide: LDAP Injection via Unescaped Username in GetUser Filter

CVSS 6.3 MediumEPSS 0.0045 · 39th percentile

Published by the GitHub Advisory Database at 14 Aug 2026, 19:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/hyperledger/fabric-caGo<1.5.211.5.21
Identifiers
GHSA-xghw-p77p-3r7x · CVE-2026-53658 · GO-2026-6234
Weakness (CWE)
CWE-90
Tags
Published
14 Aug 2026
Updated
18 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Fabric CA (github.com/hyperledger/fabric-ca) versions before 1.5.21 are vulnerable to LDAP injection when configured with an LDAP backend, because the username from HTTP Basic authentication is placed into an LDAP uid search filter without escaping. An unauthenticated attacker with network access to the CA enrollment endpoint could use this to alter the search before password validation and possibly steer authentication attempts toward a victim account. Users of fabric-ca with an LDAP backend should upgrade to version 1.5.21; deployments without LDAP are not affected.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0045, the 39th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:50 UTC First seen by agentprime
  2. 31 Oct 2026, 14:50 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.