Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| guzzle | guzzle | < 7.14.2 | 7.14.2 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | guzzle | 7.14.2-1 | — |
| Debian 13 | guzzle | No fix yet | — |
| Debian 12 | guzzle | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | guzzle | No fix yet | — |
| Ubuntu 26.04 LTS | guzzle | No fix yet | — |
| Ubuntu 24.04 LTS | guzzle | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | nextcloud-server-33 | 33.0.6-r8 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | guzzlehttp/guzzle | < 7.14.2 | 7.14.2 | GHSA-94pj-82f3-465w |
References
- GitHub Security Advisory (GHSA-94pj-82f3-465w) vendor-advisory
- VulnCheck Advisory: guzzlehttp/guzzle before 7.14.2 Proxy-Authorization Header Disclosure third-party-advisory