CVE-2026-103974
- Source
- https://cve.org/CVERecord?id=CVE-2026-103974
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103974.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-103974
- Aliases
-
- GHSA-43g7-r6hp-ccf8
- Published
- 2026-10-14T18:17:13Z
- Modified
- 2026-10-16T02:47:29Z
- Severity
-
- 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- lichess.org: Stored HTML Injection via PGN Annotator Tag in Studies
- Details
-
lichess.org is the forever free, adless and open source chess server. Prior to commit c54596c9e1569d378fe20f80d4c790c6fdee54c4, a user who can add a chapter to a study can place attacker-controlled text in the PGN Annotator tag, which becomes Comment.Author.External and is returned verbatim by authorText. When a study node has at least two comments, ui/analyse/src/treeView/inlineView.ts interpolates that author string into HTML passed to the innerHTML hook without escaping it. Opening the affected study can therefore render stored attacker-controlled HTML and CSS for other viewers, including navigation to an attacker-controlled site, content spoofing, and CSS-based data exposure, although the site's content security policy blocks injected JavaScript. This vulnerability is fixed by commit c54596c9e1569d378fe20f80d4c790c6fdee54c4.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-79" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103974.json" }- References