Medium 4.7Published Jul 8, 2026

CVE-2026-59883Guzzle: Cookie Disclosure and Injection via IP-Address Domains

Updated under an hour ago (Oct 26, 2026, 2:20 PM ET)

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It affects guzzle and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for 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: 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/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: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

guzzle guzzle guzzle:guzzle (from the name)	before 7.12.3	CNA record
guzzlephp guzzle guzzlephp:guzzle	before 7.12.3	NVD

References

References

https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5w	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/guzzle/guzzle/pull/3694	x-refsource-misc, issue-tracking, patch
https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8	x-refsource-misc, patch
https://github.com/guzzle/guzzle/releases/tag/7.12.3	x-refsource-misc, release-notes

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.