Bug 2510020 (CVE-2026-67355) - CVE-2026-67355 guzzlehttp/guzzle: guzzlehttp/guzzle: Information disclosure from host-only cookie scope issue
Summary: CVE-2026-67355 guzzlehttp/guzzle: guzzlehttp/guzzle: Information disclosure f...
Keywords:
Status: NEW
Alias: CVE-2026-67355
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-01 13:03 UTC by OSIDB Bzimport
Modified: 2026-08-27 15:45 UTC (History)
0 users

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Description OSIDB Bzimport 2026-08-01 13:03:41 UTC 
guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in the Domain field instead of marking cookies as host-only. Attackers controlling child hosts can receive host-only cookies intended only for parent hosts, potentially disclosing session identifiers and authorization tokens when the same cookie jar is reused across trust boundaries.
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