Bug 2496765 (CVE-2026-8924)

Summary:	CVE-2026-8924 curl: curl: Cookie injection via malicious HTTP server using super cookies
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, anthomas, aos-team-art-private, asdas, bbrownin, crizzo, csutherl, dbosanac, dpaolell, ehelms, ggainey, gtanzill, jbuscemi, jclere, jdelft, jpasqual, jreimann, jupierce, juwatts, kshier, lgarciaa, mbiarnes, mdellweg, mdessi, mhulan, mrizzi, nmoumoul, osousa, pcattana, pcreech, pjindal, plodge, ppalepu, ppostler, prdhamdh, rchan, rekumar, rhel-process-autobot, sdawley, sghai, sidsharm, smallamp, stcannon, suppawar, szappis, teagle, 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 curl's cookie parsing logic. A malicious HTTP server can exploit this by setting 'super cookies' that bypass the Public Suffix List check. This allows an attacker-controlled origin to inject cookies that curl then transmits to unrelated third-party domains, leading to compromising request integrity.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2497598, 2497599, 2497597
Bug Blocks:

Description OSIDB Bzimport 2026-07-03 07:01:55 UTC

A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set
'super cookies' that bypass the Public Suffix List check. This enables an
attacker-controlled origin to inject cookies that curl subsequently scopes and
transmits to unrelated third-party domains.

Comment 3 Jon Orris 2026-09-21 06:14:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:69125 https://access.redhat.com/errata/RHSA-2026:69125

Comment 4 Jon Orris 2026-09-28 14:23:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:72506 https://access.redhat.com/errata/RHSA-2026:72506

Comment 5 Jon Orris 2026-10-12 03:14:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:80511 https://access.redhat.com/errata/RHSA-2026:80511