CVE-2026-67355: high-severity vulnerability in guzzle
guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.4%
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.
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
Affected products
guzzle · guzzleRelated CVEs — guzzle
In the same product, most dangerous first.
CVE-2022-31042HIGHFailure to strip the Cookie header on change in host or HTTP downgrade in GuzzleEPSS 2.0%CVE-2022-31043HIGHFix failure to strip Authorization header on HTTP downgrade in GuzzleEPSS 2.0%CVE-2022-31090HIGHCURLOPT_HTTPAUTH option not cleared on change of origin in GuzzleEPSS 1.9%CVE-2022-31091HIGHChange in port should be considered a change in origin in GuzzleEPSS 1.6%CVE-2022-29248HIGHCross-domain cookie leakage in GuzzleEPSS 1.4%CVE-2026-67353MEDIUMguzzlehttp/guzzle before 7.15.1 Unbounded Cookie Denial of ServiceEPSS 0.4%