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CVE-2026-103974— lichess.org: Stored HTML Injection via PGN Annotator Tag in Studies

一分钟漏洞结论

影响对象
lichess-org lila
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

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.Ex

CVSS 5.4 · Medium

影响版本矩阵 1

厂商产品 版本范围状态
lichess-org lila < c54596c9e1569d378fe20f80d4c790c6fdee54c4 affected
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一、 漏洞 CVE-2026-103974 基础信息

漏洞信息

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Vulnerability Title
lichess.org: Stored HTML Injection via PGN Annotator Tag in Studies
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
lichess-org lila < c54596c9e1569d378fe20f80d4c790c6fdee54c4 -

二、漏洞 CVE-2026-103974 的公开POC

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三、漏洞 CVE-2026-103974 的情报信息

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CVE-2026-103974 补丁与修复 (1)

CVE-2026-103974 其他参考 (1)

IV. Related Vulnerabilities

Same product: lila
Same vendor: lichess-org
Same weakness: CWE-79

V. Comments for CVE-2026-103974

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