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CVE-2026-67355

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bdd24e94d5ead86ceefaaae17bba35f6bcc7d587e5d2c4be08c428a446804543
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"guzzle","vendor":"guzzle","versions":[{"lessThan":"7.15.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"7.15.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-201","description":"Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"GitHub Security Advisory (GHSA-wm3w-8rrp-j577)","tags":["vendor-advisory"],"url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/references/0
{"name":"VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0de3f01fd6f790ddec290381b6dbe9eb1c5f7a2c65bf964949e3f85eff12e4fe · sha256:e9ecaaa17e0b4ea1… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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