{"id":"CVE-2026-59883","title":"Guzzle is an extensible PHP HTTP client","summary":"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 m…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-346","CWE-384"],"vendor":"guzzlephp","product":"guzzle","affected":["guzzle < 7.12.3"],"patched":["guzzle 7.12.3"],"published":"2026-07-08","updated":"2026-07-13","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59883","references":[{"url":"https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8","label":"security-advisories@github.com"},{"url":"https://github.com/guzzle/guzzle/pull/3694","label":"security-advisories@github.com"},{"url":"https://github.com/guzzle/guzzle/releases/tag/7.12.3","label":"security-advisories@github.com"},{"url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5w","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00167,"epssPercentile":0.06409,"ingestedAt":"2026-07-13T14:27:26.837Z","slug":"CVE-2026-59883","body":"## Overview\n\nGuzzle 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.\n\n## Affected\n\n- `guzzle < 7.12.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `guzzle 7.12.3`","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}