High severity8.1NVD Advisory· Published May 12, 2026· Updated May 14, 2026

CVE-2026-44304

Description

Lemur manages TLS certificate creation. Prior to 1.9.0, Lemur's LDAP authentication module (lemur/auth/ldap.py) constructs LDAP search filters using unsanitized user input via Python string interpolation. An authenticated LDAP user can inject LDAP filter metacharacters through the username field to manipulate group membership queries and escalate their privileges to administrator. This vulnerability is fixed in 1.9.0.

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Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
lemurPyPI	< 1.9.0	1.9.0

Affected products

ghsa-coords
pkg:pypi/lemur
Range: < 1.9.0

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-3r34-vq8m-39ghghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2026-44304ghsaADVISORY
github.com/Netflix/lemur/releases/tag/v1.9.0ghsaWEB
github.com/Netflix/lemur/security/advisories/GHSA-3r34-vq8m-39ghnvdWEB

News mentions

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