{"id":"CVE-2026-12228","summary":"Stored XSS in Direct Messages via Prompt Sharing in parisneo/lollms","details":"A stored cross-site scripting (XSS) vulnerability exists in the `POST /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint stores attacker-controlled `prompt_content` into `DBDirectMessage.content` without server-side sanitization. When a victim opens the direct message (DM) thread, the message is rendered by the DM UI through `MessageContentRenderer`, which uses `v-html` to insert rendered HTML into the DOM. The frontend sanitizer, which is regex-based, fails to comprehensively sanitize attacker-controlled HTML, allowing malicious payloads to execute in the victim's browser context. This vulnerability enables any authenticated user to send a malicious prompt-share message to another user's inbox, leading to arbitrary JavaScript execution, authenticated actions as the victim, exposure of same-origin application data, and potential account takeover.","modified":"2026-08-21T03:46:31.608532532Z","published":"2026-07-18T20:36:36.906Z","database_specific":{"cna_assigner":"@huntr_ai","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12228.json"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/25623635-5ceb-4062-8289-02089e6d97c1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12228.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12228"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/parisneo/lollms","events":[{"introduced":"0"},{"last_affected":"a9b21a0c417f8a67bc221c699cfae8c75068ed90"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:lollms:lollms:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"2.1.0"}]}}],"versions":["v2.1.0","v2.0.0","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12228.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"}]}