What is GHSA-mjrx-74jh-7xgw?

GHSA-mjrx-74jh-7xgw is a security advisory published by GitHub Security Advisories with High severity. Duplicate Advisory: Guzzle: Host-only cookie scope is not preserved

Why does GHSA-mjrx-74jh-7xgw 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-mjrx-74jh-7xgw?

GHSA-mjrx-74jh-7xgw has a CVSS v3 base score of 5.9, published by GitHub Security Advisories.

Which products are affected by GHSA-mjrx-74jh-7xgw?

GHSA-mjrx-74jh-7xgw affects 1 product, including: composer/guzzlehttp/guzzle:\u003c 7.15.1.

⚠ Withdrawn by GitHub Security Advisories

Withdrawn: August 4, 2026

GHSA-mjrx-74jh-7xgwHighCVSS 5.9Disclosed before NVD

Duplicate Advisory: Guzzle: Host-only cookie scope is not preserved

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This advisory has been withdrawn because it is a duplicate of GHSA-wm3w-8rrp-j577. This link is maintained to preserve external references.

Original Description

guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in the Domain field instead of marking cookies as host-only. Attackers controlling child hosts can receive host-only cookies intended only for parent hosts, potentially disclosing session identifiers and authorization tokens when the same cookie jar is reused across trust boundaries.

🎯 Affected products1

composer/guzzlehttp/guzzle:< 7.15.1

🔗 References (4)

https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577
https://nvd.nist.gov/vuln/detail/CVE-2026-67355
https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope
https://github.com/advisories/GHSA-mjrx-74jh-7xgw