{"id":"CVE-2026-59883","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-59883","generatedAt":"2026-10-28T04:11:13.603Z","title":"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,…","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.","published":"2026-07-08T17:17:27.000Z","lastModified":"2026-07-13T14:01:40.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-346","CWE-384"],"affected":["guzzlephp/guzzle"],"epss":{"score":0.00167,"percentile":0.05935,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/guzzle/guzzle/pull/3694","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/guzzle/guzzle/releases/tag/7.12.3","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5w","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-59883","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}