What is GHSA-3fvr-2jw6-crq4?

GHSA-3fvr-2jw6-crq4 is a security advisory published by GitHub Security Advisories with Medium severity. Duplicate Advisory: Guzzle: Unbounded response cookies risk denial of service

Why does GHSA-3fvr-2jw6-crq4 have no CVE ID yet?

GitHub Security Advisories published this advisory directly to customers before NVD assigned a CVE ID. This is the embargo-window disclosure pattern — vendors notify customers on day 0; NVD's public record follows days to weeks later.

What is the CVSS v3 score of GHSA-3fvr-2jw6-crq4?

GHSA-3fvr-2jw6-crq4 has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

Which products are affected by GHSA-3fvr-2jw6-crq4?

GHSA-3fvr-2jw6-crq4 affects 1 product, including: composer/guzzlehttp/guzzle:\u003c 7.15.1.

⚠ Withdrawn by GitHub Security Advisories

Withdrawn: August 4, 2026

GHSA-3fvr-2jw6-crq4MediumCVSS 5.3Disclosed before NVD

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

Vendor

GitHub Security Advisories

Published

August 1, 2026

Last Modified

August 4, 2026

📋 Description

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This advisory has been withdrawn because it is a duplicate of GHSA-f283-ghqc-fg79.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 products1

composer/guzzlehttp/guzzle:< 7.15.1

🔗 References (4)

https://github.com/guzzle/guzzle/security/advisories/GHSA-f283-ghqc-fg79
https://nvd.nist.gov/vuln/detail/CVE-2026-67353
https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-unbounded-cookie-denial-of-service
https://github.com/advisories/GHSA-3fvr-2jw6-crq4