{"id":"CVE-2026-67353","revision":"9936d6aafa9948fbb08cda96a97b67ee","records":[{"revision":"9936d6aafa9948fbb08cda96a97b67ee","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-67353","aliases":[],"title":"guzzlehttp/guzzle before 7.15.1 Unbounded Cookie Denial of Service","description":"guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.","state":0,"publishedAt":"2026-08-01T12:22:17.339+00:00","modifiedAt":"2026-10-08T15:24:15.436+00:00","affected":[{"ecosystem":"Vendor product","name":"guzzle","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"guzzle\",\n                    \"product\": \"guzzle\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"7.15.1\"\n                        },\n                        {\n                            \"version\": \"7.15.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:composer/guzzlehttp/guzzle\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/guzzle/guzzle/security/advisories/GHSA-f283-ghqc-fg79","https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-unbounded-cookie-denial-of-service"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-67353","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-67353","identifiers":["CVE-2026-67353"]},"retained":false,"historicalAffected":[]}],"coverage":[]}