{"id":"CVE-2026-67355","state":"PUBLISHED","title":"guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope","description":"guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in the Domain field instead of marking cookies as host-only. Attackers controlling child hosts can receive host-only cookies intended only for parent hosts, potentially disclosing session identifiers and authorization tokens when the same cookie jar is reused across trust boundaries.","publishedAt":"2026-08-01T12:22:17.646Z","updatedAt":"2026-10-08T15:24:16.706Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["guzzle guzzle"],"affected":[{"vendor":"guzzle","product":"guzzle","packageURL":"pkg:composer/guzzlehttp/guzzle","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"7.15.1","versionType":"semver"},{"version":"7.15.1","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577","https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope"],"weaknesses":["CWE-201"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67355.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67355","state":"PUBLISHED","datePublished":"2026-08-01T12:22:17.646Z","dateUpdated":"2026-10-08T15:24:16.706Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-29T13:36:36.278Z"},"containers":{"cna":{"title":"guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope","descriptions":[{"lang":"en","value":"guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in the Domain field instead of marking cookies as host-only. Attackers controlling child hosts can receive host-only cookies intended only for parent hosts, potentially disclosing session identifiers and authorization tokens when the same cookie jar is reused across trust boundaries."}],"affected":[{"vendor":"guzzle","product":"guzzle","packageURL":"pkg:composer/guzzlehttp/guzzle","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"7.15.1","versionType":"semver"},{"version":"7.15.1","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-wm3w-8rrp-j577)"},{"url":"https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope","name":"VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-201","lang":"en","description":"Insertion of Sensitive Information Into Sent Data","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-08T15:24:16.706Z"},"datePublic":"2026-07-18T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:guzzlephp:guzzle:*:*:*:*:*:*:*:*","versionEndExcluding":"7.15.1"}]}]}],"credits":[{"lang":"en","value":"GrahamCampbell","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-03T19:37:13.624487Z","id":"CVE-2026-67355","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-03T19:37:29.123Z"}}]}}}