---
id: GHSA-3fvr-2jw6-crq4
title: 'Duplicate Advisory: Guzzle: Unbounded response cookies risk denial of service'
summary: 'Duplicate Advisory: Guzzle: Unbounded response cookies risk denial of service'
severity: medium
cvss: 5.3
cwe:
  - CWE-770
vendor: guzzlehttp
product: guzzlehttp/guzzle
ecosystem: composer
affected:
  - guzzlehttp/guzzle < 7.15.1
published: '2026-08-01'
updated: '2026-08-04'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-3fvr-2jw6-crq4'
references:
  - url: 'https://github.com/guzzle/guzzle/security/advisories/GHSA-f283-ghqc-fg79'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67353'
  - url: >-
      https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-unbounded-cookie-denial-of-service
  - url: 'https://github.com/advisories/GHSA-3fvr-2jw6-crq4'
tags:
  - ghsa
  - composer
ingestedAt: '2026-08-05T05:58:04.854Z'
---

## Overview

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This advisory has been withdrawn because it is a duplicate of GHSA-f283-ghqc-fg79.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

- `guzzlehttp/guzzle < 7.15.1`

## Remediation

Refer to the advisory for the patched release.