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Advisory record · GHSA-vr7c-r5gj-j3w5

Lemur: LDAP Authentication Globally Disables TLS Certificate Verification When LDAP_USE_TLS Is Enabled

CVSS 6.8 MediumEPSS 0.0014 · 3rd percentile

Published by the GitHub Advisory Database at 6 May 2026, 18:48 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
lemurPyPI<1.9.01.9.0
Identifiers
GHSA-vr7c-r5gj-j3w5 · CVE-2026-44305 · PYSEC-2026-2590
Weakness (CWE)
CWE-295
Tags
Published
6 May 2026
Updated
13 Jul 2026

Machine-written summary

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

Lemur versions before 1.9.0 disable TLS certificate verification process-wide when LDAP_USE_TLS is enabled, so LDAP connections accept any certificate. An attacker in a network position between Lemur and the LDAP server could intercept LDAP credentials and modify directory responses, such as group memberships. Upgrade to Lemur 1.9.0 or later, which is the listed fixed version. The source gives no workaround.

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
6.8 Medium 3.1 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0014, the 3rd percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:02 UTC First seen by agentprime
  2. 31 Oct 2026, 15:02 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.