{"id":"USN-8655-1","summary":"async-http-client vulnerability","details":"It was discovered that AsyncHttpClient did not properly verify that the\nresponding host was allowed to set cookies for a given domain in its\nThreadSafeCookieStore. An attacker could use this to plant cookies scoped to\nunrelated domains, which would then be sent on later requests to those\ndomains.","modified":"2026-08-26T22:58:00.266288390Z","published":"2026-08-20T17:57:45Z","related":["UBUNTU-CVE-2026-55688"],"upstream":["CVE-2026-55688","UBUNTU-CVE-2026-55688"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8655-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-55688"}],"affected":[{"package":{"name":"async-http-client","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/async-http-client?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.0-1ubuntu0.1~esm1"}]}],"versions":["2.6.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.6.0-1ubuntu0.1~esm1","binary_name":"libasync-http-client-java"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-55688"}],"ecosystem":"Ubuntu:Pro:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json"}},{"package":{"name":"async-http-client","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/async-http-client?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.3-1ubuntu0.22.04.1"}]}],"versions":["2.12.2-1","2.12.3-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.12.3-1ubuntu0.22.04.1","binary_name":"libasync-http-client-java"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-55688"}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"async-http-client","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/async-http-client?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.3-1ubuntu0.24.04.1"}]}],"versions":["2.12.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libasync-http-client-java","binary_version":"2.12.3-1ubuntu0.24.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json","cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-55688","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]}}},{"package":{"name":"async-http-client","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/async-http-client?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.3-1ubuntu1.1"}]}],"versions":["2.12.3-1","2.12.3-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libasync-http-client-java","binary_version":"2.12.3-1ubuntu1.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-55688","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json"}}],"schema_version":"1.9.0"}