CVE-2026-67339
Fixed in a distro release EPSS <1%CVSS 5.3
guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.
Products: guzzle
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Packagist | guzzlehttp/guzzle | 7.14.2 |
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 | 7.14.2-1 |
| 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 |