A AegiFlow
MEDIUMCVSS 6.9

GHSA-3fvr-2jw6-crq4

Duplicate Advisory: Guzzle: Unbounded response cookies risk denial of service

Published
2026-08-01
Modified
2026-08-04
Sources
github-advisory

Summary

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-f283-ghqc-fg79. This link is maintained to preserve external references. ## Original 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 packages

EcosystemPackageAffected versionsFixed versions
Packagistguzzlehttp/guzzle

Remediation: No patched version is listed by GitHub.

References

Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.