Bug 2476978 (CVE-2026-7009)

Summary: CVE-2026-7009 curl: Curl: Certificate validation bypass due to OCSP stapling flaw
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adudiak, dbosanac, gtanzill, jbuscemi, jmitchel, jreimann, kshier, mdessi, mrizzi, pcattana, rhel-process-autobot, sdawley, stcannon, teagle, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in curl. When curl is configured to use the Certificate Status Request TLS (Transport Layer Security) extension, also known as OCSP (Online Certificate Status Protocol) stapling, it fails to properly detect issues with the OCSP response. This can lead curl to incorrectly validate a server certificate as legitimate, potentially allowing an attacker to bypass certificate validation and establish a connection to a malicious server.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2491326, 2491327    
Bug Blocks:    

Description OSIDB Bzimport 2026-05-13 10:01:31 UTC 
When curl is told to use the Certificate Status Request TLS extension, often
referred to as *OCSP stapling*, to verify that the server certificate is
valid, it fails to detect OCSP problems and instead wrongly consider the
response as fine.