Missing Authorization Affecting lemur package, versions [,1.9.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 Aug 2026
- disclosed18 Aug 2026
- creditUnknown
Introduced: 18 Aug 2026
NewCVE-2026-71317 (opens in a new tab)How to fix?
Upgrade lemur to version 1.9.3 or higher.
Overview
lemur is a Certificate management and orchestration service
Affected versions of this package are vulnerable to Missing Authorization in the POST /api/1/authorities process when the ADMIN_ONLY_AUTHORITY_CREATION configuration is set to False. An attacker can gain unauthorized control over certificate authority creation by submitting requests that specify a parent authority for which they lack proper permissions, resulting in the ability to mint intermediate certificate authorities chained to internal roots and issue trusted certificates for arbitrary domains.
Note: This is only exploitable if the deployment has ADMIN_ONLY_AUTHORITY_CREATION=False and the attacker is an authenticated non-read-only user.