CVE-2026-59883CWE-346CWE-384

Guzzle: Cookie Disclosure and Injection via IP-Address Domains

Medium · published July 8, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
5.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00167 · 5.7th percentile
Weaknesses
CWE-346 · Origin Validation Error; CWE-384 · Session Fixation
Published
2026-07-08T15:56Z
EPSS history
Timeline
  • 08 JUL 15:56Z
    Guzzle: Cookie Disclosure and Injection via IP-Address Domains
    cvelistv5