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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-67353

guzzlehttp/guzzle before 7.15.1 Unbounded Cookie Denial of Service

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

guzzle guzzle

Default version status: unaffected

  • 0 to < 7.15.1affected
  • 7.15.1unaffected
pkg:composer/guzzlehttp/guzzle

References