CVE-2026-88055
Dashboard / Vulnerabilities / CVE-2026-88055
Summary: AnythingLLM: Stored XSS Due to Unescaped Server-Side HTML Concatenation in MetaGenerator
Details: AnythingLLM 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.
References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88055.json, https://github.com/Mintplex-Labs/anything-llm/commit/6dff9d71ab585e87a3145a48abc63c2b60151149, https://github.com/Mintplex-Labs/anything-llm/security/advisories/GHSA-rh3m-xv7m-9jhf, https://nvd.nist.gov/vuln/detail/CVE-2026-88055
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