{"id":"CVE-2026-2736","summary":"Reflected Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms","details":"Reflected Cross-site Scripting (XSS) in Alkacon's OpenCms v18.0, which allows an attacker to execute JavaScript code in the victim's browser by sending the victim a malicious URL containing the ‘q’ parameter in ‘/search/index.html’. This vulnerability can be exploited to steal sensitive user information such as session cookies, or to perform actions while impersonating the user.","modified":"2026-08-12T03:51:24.754277391Z","published":"2026-02-19T08:39:46.150Z","database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2736.json","unresolved_ranges":[{"extracted_events":[{"introduced":"18.0"},{"last_affected":"18.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"INCIBE"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2736.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2736"},{"type":"FIX","url":"https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/alkacon/opencms-core","events":[{"introduced":"b6fe78b972f1dabb9cb06e800b4e8fe278741c8d"},{"last_affected":"b6fe78b972f1dabb9cb06e800b4e8fe278741c8d"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:alkacon:opencms:18.0.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"18.0.0"},{"last_affected":"18.0.0"}]}}],"versions":["18.0.0","build_18_0_0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2736.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}]}