Bug 2501952 (CVE-2026-54171)

Summary:	CVE-2026-54171 excon: Excon: Information disclosure via unstripped sensitive headers during redirects
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:	akostadi, amasferr, anthomas, dmayorov, ehelms, ggainey, jlledo, jpasqual, juwatts, mdellweg, mhulan, nmoumoul, osousa, pantinor, pcreech, rchan, smallamp, tmalecek, tsedmik
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Excon, a Ruby HTTP client library. The RedirectFollower middleware, responsible for handling redirects, failed to remove sensitive header information when a request was redirected to a new target. This oversight could lead to the unintended exposure of confidential data to an unauthorized destination, potentially compromising sensitive information.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2529406
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Description OSIDB Bzimport 2026-07-17 21:03:09 UTC

Excon is usable, fast, simple HTTP 1.1 for Ruby. Prior to 1.5.0, Excon's RedirectFollower middleware failed to strip additional sensitive headers when following redirects and did not provide a custom list of headers to strip. This could cause inadvertent leakage of sensitive data when the initial request includes header information that is not intended for the new target. This issue is fixed in version 1.5.0.