Vulnerability in Lemur TLS Certificate Management by Netflix
CVE-2026-48508

8.8HIGH

Key Information:

Vendor

Netflix

Status
Lemur
Vendor
CVE Published:
18 August 2026

What is CVE-2026-48508?

A security flaw in Lemur's TLS certificate management permits unauthorized actions due to insufficient permission checks. This vulnerability specifically affects versions prior to 1.9.1, where the 'StrictRolePermission' and 'AuthorityCreatorPermission' are not enforced correctly when certain configuration flags are unset. Consequently, authenticated users, even those with only read-only access, can exploit this issue to create, upload, and manage Certificate Authorities and notifications, potentially leading to security breaches. It is critical to update to version 1.9.1 to mitigate these risks.

Affected Version(s)

lemur < 1.9.1

References

https://github.com/Netflix/lemur/security/advisories/GHSA...
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https://github.com/Netflix/lemur/commit/e6a41e2c1b2028840...
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https://github.com/Netflix/lemur/releases/tag/v1.9.1
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CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.