VULNERABILITY INTELLIGENCE
CVE-2026-67353
CVSS score5.3 MEDIUM
EPSS probability0.42%
CISA KEVNot currently listed
Published2026-08-01
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Description
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.
Weakness classification
- disclosure@vulncheck.com: CWE-770