guzzle: Guzzle is an extensible PHP HTTP client
CVE-2026-59883 is fixed in guzzle on 1 platform by DEBIAN-CVE-2026-59883 (version 7.12.3-1), released July 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| guzzle · Debian 14 | 7.12.3-1 | DEBIAN-CVE-2026-59883 | Jul 9, 2026 |
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