Bug 2529202 (CVE-2026-82208)

Summary:	CVE-2026-82208 curl: libcurl: Improper certificate validation when using wolfSSL CA cache
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, anthomas, aos-team-art-private, asdas, bbrownin, crizzo, csutherl, dpaolell, ehelms, ggainey, gtanzill, jbuscemi, jclere, jdelft, jpasqual, jupierce, juwatts, lgarciaa, mbiarnes, mdellweg, mhulan, nmoumoul, osousa, pcreech, pjindal, plodge, ppalepu, ppostler, prdhamdh, rchan, rekumar, rhel-process-autobot, sdawley, sghai, sidsharm, smallamp, suppawar, szappis, tmalecek, vchlup, vlaad, vvoronko, watson-tool-maintainers, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in libcurl when using the wolfSSL backend. When CA (Certificate Authority) caching is enabled and a CURLOPT_SSL_CTX_FUNCTION callback is used to replace the trust store, libcurl can silently reinstall the cached store. This can lead to a scenario where a certificate that should be rejected by the callback-selected store is incorrectly accepted if it is trusted by the cached store, resulting in improper certificate validation.	Story Points:	---
Clone Of:		Environment:
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-06 18:01:29 UTC

With the wolfSSL backend, when CA caching is enabled and an
`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can
silently reinstall the cached store after the callback returns. A certificate
trusted by the cached store but rejected by the callback-selected store is
then incorrectly accepted.