Medium 6.1Published Jul 8, 2026

CVE-2026-59883Guzzle is an extensible PHP HTTP client.

Updated under an hour ago (2026-10-19 08:00 UTC)

Does this affect you?

It affects guzzlephp guzzle. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for guzzlephp guzzle

Exploited in the last 30 days

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.

CVSS: 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-346, CWE-384
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

guzzlephp guzzle guzzlephp:guzzle	before 7.12.3	NVD

References

https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8patch
https://github.com/guzzle/guzzle/pull/3694issue-tracking, patch
https://github.com/guzzle/guzzle/releases/tag/7.12.3release-notes
https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5wmitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.