Description
Guzzle is an extensible PHP HTTP client. Prior to 7.12.3, CookieJar did not restrict cookies scoped to IP-address or bare-numeric Domain values to the exact host that set them, because SetCookie::matchesDomain() applied ordinary suffix matching to domains such as 192.168.0.1, [::1], or 1, allowing cross-host cookie disclosure, cookie injection, or session fixation. This issue is fixed in version 7.12.3.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| guzzle | guzzle | < 7.12.3 | — |
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 | 7.12.3-1 | — |
| 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 25.10 | guzzle | No fix yet | — |
| Ubuntu 24.04 LTS | guzzle | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | guzzlehttp/guzzle | < 7.12.3 | 7.12.3 | GHSA-g446-98w2-8p5w |