CVE-2026-67355
Fixed in a distro release EPSS <1%CVSS 5.9
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.
Products: guzzle
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Packagist | guzzlehttp/guzzle | 7.15.1 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | drupal-11.3 | 11.3.16-r0 |
| Chainguard | nextcloud-server-31 | 31.0.14-r5 |
| Chainguard | nextcloud-server-32 | 32.0.12-r6 |
| Chainguard | nextcloud-server-33 | 33.0.6-r8 |
| Chainguard | nextcloud-server-34 | 34.0.1-r9 |
| Chainguard | privatebin | 2.0.5-r1 |
| Debian:12 | guzzle | no fix |
| Debian:13 | guzzle | no fix |
| Debian:14 | guzzle | 7.15.1-1 |
| Ubuntu:24.04:LTS | guzzle | no fix |
| Ubuntu:26.04:LTS | guzzle | no fix |
| Ubuntu:26.10 | guzzle | no fix |
| Wolfi | nextcloud-server-32 | 32.0.12-r6 |
| Wolfi | nextcloud-server-33 | 33.0.6-r8 |