GHSA-3fvr-2jw6-crq4: Duplicate Advisory Denial of Service Vulnerability

MODERATE
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CVSS 5.3
CWE-770
Published
Advisory Summary

GHSA-3fvr-2jw6-crq4 is a MODERATE (CVSS 5.3) denial of service vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves guzzle: unbounded response cookies risk denial of service. Remediation is available in the latest vendor maintenance releases.

GHSA-3fvr-2jw6-crq4 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-3fvr-2jw6-crq4
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Duplicate Advisory
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix GHSA-3fvr-2jw6-crq4

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

guzzlehttp/guzzle fixed: Latest secure release 
Upgrade guzzlehttp/guzzle to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for guzzlehttp/guzzle

How to Check if You Are Affected

To determine whether your application is affected by GHSA-3fvr-2jw6-crq4, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for guzzlehttp/guzzle

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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.

GHSA-3fvr-2jw6-crq4 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
guzzlehttp/guzzle
 Packagist

References

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

Frequently Asked Questions

What is GHSA-3fvr-2jw6-crq4?
GHSA-3fvr-2jw6-crq4 is a security vulnerability in Duplicate Advisory involving Guzzle: Unbounded response cookies risk denial of service under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: guzzlehttp/guzzle.
What version fixes GHSA-3fvr-2jw6-crq4?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is guzzlehttp/guzzle affected?
Yes, guzzlehttp/guzzle is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-3fvr-2jw6-crq4?
GHSA-3fvr-2jw6-crq4 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with GHSA-3fvr-2jw6-crq4?
GHSA-3fvr-2jw6-crq4 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check Packagist dependencies for GHSA-3fvr-2jw6-crq4?
Run the dependency tree command: 'inspect dependencies for guzzlehttp/guzzle'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3fvr-2jw6-crq4",
  "modified" : "2026-08-04T12:58:32Z",
  "published" : "2026-08-01T15:30:30Z",
  "withdrawn" : "2026-08-04T12:58:31Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Guzzle: Unbounded response cookies risk denial of service",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-f283-ghqc-fg79. This link is maintained to preserve external references.\n\n## Original Description\nguzzlehttp/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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "guzzlehttp/guzzle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 7.15.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/guzzle/guzzle/security/advisories/GHSA-f283-ghqc-fg79"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-67353"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-unbounded-cookie-denial-of-service"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-04T12:58:31Z",
    "nvd_published_at" : "2026-08-01T13:17:06Z"
  }
}