CVE-2026-35208

Katalog CVE

CVSS 5.4 · Medium EPSS 0,35%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada lichess lila. Skor CVSS 3.1 5.4 (Medium) menurut NVD.

Deskripsi (NVD)

lichess.org is the forever free, adless and open source chess server. Any approved streamer can inject arbitrary HTML into /streamer and the homepage “Live streams” widget by placing markup in their Twitch/YouTube stream title. CSP is present and blocks inline script execution, but the issue is still a server-side HTML injection sink. To trigger this, a Lichess account only needs to satisfy the normal streamer requirements and get approved. Per Streamer.canApply, that means an account older than 2 days with at least 15 games, or a verified/titled account. After moderator approval, once the streamer goes live, Lichess pulls the platform title and renders it into the UI as-is. No extra privileges are needed beyond a normal approved streamer profile. This vulnerability is fixed with commit 0d5002696ae705e1888bf77de107c73de57bb1b3.

Rincian

Terbit di NVD

6 April 2026

Terakhir diubah

24 Juli 2026

Status NVD

Analyzed

CVSS 3.1

5.4 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116: Improper Encoding or Escaping of Output

EPSS (30 hari)

0,35% peluang dieksploitasi; lebih tinggi dari 27,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/lichess-org/lila/security/advisories/GHSA-v7gh-939r-pfjq exploit · advisory vendor
• https://github.com/lichess-org/lila/commit/0d5002696ae705e1888bf77de107c73de57bb1b3 patch
• https://vimeo.com/1175908262 exploit