23 Oct 2026 15:48:27 UTC
AnythingLLM: Stored XSS Due to Unescaped Server-Side HTML Concatenation in MetaGenerator
cve-program · CVE-2026-88055 · Published
CVE-2026-88055
AnythingLLM: Stored XSS Due to Unescaped Server-Side HTML Concatenation in MetaGenerator
CVSS 3.1 5.5 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-88055
PublishedAnythingLLM is an application that turns pieces of content into context that any LLM can use as references during chatting. In 1.16.1 and earlier, the manager role can store meta_page_title or meta_page_favicon through /api/admin/system-preferences, and MetaGenerator inserts those values into production homepage HTML without escaping attribute values or text content. The values pass unchanged through server/models/systemSettings.js and reach MetaGenerator.generate() in server/index.js. #assembleMeta() in server/utils/boot/MetaGenerator.js concatenates the stored values into HTML. When an administrator visits the homepage /, injected JavaScript can read the administrator JWT and use it to create API keys, access or modify workspace and chat data, delete users, and perform other administrator actions. server/endpoints/admin.js accepts the manager-controlled settings before server/models/systemSettings.js returns them unchanged. No fixed version is available as of this review.
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