Bug 2510040 (CVE-2026-67353) - CVE-2026-67353 guzzlehttp/guzzle: guzzlehttp/guzzle: Denial of Service via unbounded cookie storage
Summary: CVE-2026-67353 guzzlehttp/guzzle: guzzlehttp/guzzle: Denial of Service via un...
Keywords:
Status: NEW
Alias: CVE-2026-67353
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 13:04 UTC by OSIDB Bzimport
Modified: 2026-08-27 15:28 UTC (History)
0 users

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Description OSIDB Bzimport 2026-08-01 13:04:45 UTC 
guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.
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