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Lemur: SSRF protection in certificate revocation checking bypassable via HTTP redirects and DNS rebinding (incomplete fix for GHSA-54vg-pfh7-jq95)

🗓️ 19 Aug 2026 11:56:28Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 3 Views

Lemur SSRF bypass via HTTP redirects and DNS rebinding in certificate revocation checking, reaching internal hosts.

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Detection
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Vulners
Node
pypilemurRange01.9.3

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19 Aug 2026 12:16Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.16.3
EPSS0.00135
3