PT-2026-80652

Summary The fix for GHSA-v2wp-frmc-5q3v added validate acme url to reject acme url values not in ACME DIRECTORY HOST ALLOWLIST, but the validation is only called at authority creation time POST. The authority update endpoint PUT /api/1/authorities/ accepts and stores arbitrary options -- includin...

CVE-2026-71303

Lemur manages TLS certificate creation. Prior to 1.9.3, validateacmeurl enforced ACMEDIRECTORYHOSTALLOWLIST when an authority was created, but PUT /api/1/authorities/ passed options to lemur/authorities/service.py without applying the same check. A user holding an authority role could replace the...

PT-2026-80334

Summary The ACME client used to issue certificates from Let's Encrypt / Google Public CA / private ACME CAs connects to an acme url, then issues requests to URLs that the ACME server returns in its directory/order/authorization/finalize responses - this is the classic ACME-client SSRF RFC 8555...

PT-2026-80313

Summary The fix for GHSA-v2wp-frmc-5q3v added validate acme url to reject acme url values not in ACME DIRECTORY HOST ALLOWLIST, but the validation is only called at authority creation time POST. The authority update endpoint PUT /api/1/authorities/ accepts and stores arbitrary options -- includin...

Server-side Request Forgery (SSRF)

Overview lemur is a Certificate management and orchestration service Affected versions of this package are vulnerable to Server-side Request Forgery SSRF through the improper handling of user-supplied URLs in the acmeurl parameter, lack of access control in the certificate key-fetch process, and...

Lemur: ACME SSRF + creator-equality IDOR lead to AWS IAM/PKI compromise

Lemur 1.9.0: any SSO-authenticated user achieves AWS IAM compromise and permanent PKI key access via ACME acmeurl SSRF and creator-equality IDOR Vulnerability Summary Field | Value -- | -- Title | Lemur 1.9.0: any SSO-authenticated user achieves AWS IAM compromise and permanent PKI key access via...