Packagist/guzzlehttp/guzzle CVE-2026-55767: medium 5.8, EPSS 0.21%

guzzlehttp/guzzle: Dot-Only Cookie Domains Match All Hosts

Action: Upgrade guzzlehttp/guzzle to 7.12.1 or later.

composer require guzzlehttp/guzzle:7.12.1

Affected

Fixed versions

Sources

• osv: GHSA-cwxw-98qj-8qjx
• https://github.com/guzzle/guzzle/security/advisories/GHSA-cwxw-98qj-8qjx
• https://nvd.nist.gov/vuln/detail/CVE-2026-55767
• https://github.com/guzzle/guzzle/pull/3653
• https://github.com/guzzle/guzzle/commit/7f537cded1912349abf5081258d6db19106d774d
• https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/guzzle/CVE-2026-55767.yaml
• https://github.com/guzzle/guzzle
• https://github.com/guzzle/guzzle/releases/tag/7.12.1

CVE-2026-55767 · published 2026-06-19T14:37:29Z · modified 2026-09-10T03:50:49.287156552Z · JSON