{"id":"UBUNTU-CVE-2026-67353","details":"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.","modified":"2026-08-06T00:23:23Z","published":"2026-08-01T13:17:00Z","upstream":["CVE-2026-67353"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-67353"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-67353"},{"type":"REPORT","url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-f283-ghqc-fg79"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-unbounded-cookie-denial-of-service"}],"affected":[{"package":{"name":"guzzle","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/guzzle?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.4.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.4.5-1","binary_name":"php-guzzlehttp-guzzle"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67353.json"}},{"package":{"name":"guzzle","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/guzzle?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.9.2-0.1","7.9.2-0.1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.9.2-0.1build1","binary_name":"php-guzzlehttp-guzzle"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67353.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}