{"document":{"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright © Red Hat, Inc. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"legal_disclaimer","text":"This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.","title":"Terms of Use"}],"publisher":{"category":"vendor","contact_details":"https://access.redhat.com/security/team/contact/","issuing_authority":"Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.","name":"Red Hat Product Security","namespace":"https://www.redhat.com"},"references":[{"category":"self","summary":"Canonical URL","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59883.json"}],"title":"guzzle/guzzle: Guzzle: Cross-host cookie disclosure and injection due to improper domain matching in CookieJar.","tracking":{"current_release_date":"2026-07-29T11:22:15+00:00","generator":{"date":"2026-07-29T11:22:15+00:00","engine":{"name":"Red Hat SDEngine","version":"5.3.7"}},"id":"CVE-2026-59883","initial_release_date":"2026-07-08T15:56:03.689000+00:00","revision_history":[{"date":"2026-07-08T15:56:03.689000+00:00","number":"1","summary":"Initial version"},{"date":"2026-07-29T11:17:31+00:00","number":"2","summary":"Current version"},{"date":"2026-07-29T11:22:15+00:00","number":"3","summary":"Last generated version"}],"status":"final","version":"3"}},"product_tree":{"branches":[{"category":"vendor","name":"Red Hat","product":{"name":"All currently supported Red Hat products","product_id":"red_hat_products","product_identification_helper":{"cpe":"cpe:/a:redhat"}}}]},"vulnerabilities":[{"cve":"CVE-2026-59883","discovery_date":"2026-07-08T17:01:01.591362+00:00","flags":[{"label":"vulnerable_code_not_present","product_ids":["red_hat_products"]}],"notes":[{"category":"description","text":"A flaw was found in Guzzle, an extensible PHP HTTP client. The CookieJar component improperly handled cookies for IP-address or bare-numeric domains, failing to restrict them to the exact host. This vulnerability could allow a remote attacker to disclose cookies across different hosts, inject malicious cookies, or fixate user sessions, potentially leading to unauthorized access or session hijacking.","title":"Vulnerability description"},{"category":"other","text":"Red Hat's products are not affected by this flaw because the guzzlehttp/guzzle PHP library is not shipped in any Red Hat product.","title":"Statement"},{"category":"general","text":"The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.","title":"CVSS score applicability"}],"product_status":{"known_not_affected":["red_hat_products"]},"references":[{"category":"self","summary":"Canonical URL","url":"https://access.redhat.com/security/cve/CVE-2026-59883"},{"category":"external","summary":"https://www.cve.org/CVERecord?id=CVE-2026-59883","url":"https://www.cve.org/CVERecord?id=CVE-2026-59883"},{"category":"external","summary":"https://nvd.nist.gov/vuln/detail/CVE-2026-59883","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59883"},{"category":"external","summary":"https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8","url":"https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8"},{"category":"external","summary":"https://github.com/guzzle/guzzle/pull/3694","url":"https://github.com/guzzle/guzzle/pull/3694"},{"category":"external","summary":"https://github.com/guzzle/guzzle/releases/tag/7.12.3","url":"https://github.com/guzzle/guzzle/releases/tag/7.12.3"},{"category":"external","summary":"https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5w","url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5w"}],"release_date":"2026-07-08T15:56:03.689000+00:00","scores":[{"cvss_v3":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"products":["red_hat_products"]}],"title":"guzzle/guzzle: Guzzle: Cross-host cookie disclosure and injection due to improper domain matching in CookieJar."}]}