CVE-2026-35208

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Source

https://cve.org/CVERecord?id=CVE-2026-35208

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35208.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-35208

Aliases

GHSA-v7gh-939r-pfjq

Published

2026-04-06T20:06:25.821Z

Modified

2026-07-08T07:34:21.720121345Z

Severity

5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

lichess.org has an Unsanitized Stream Title Injection on /streamer

Details

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.

Database specific

{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "0d5002696ae705e1888bf77de107c73de57bb1b3"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35208.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-116",
        "CWE-79"
    ]
}

References

Affected packages

Git / github.com/lichess-org/lila

Affected ranges

Type

GIT

Repo

https://github.com/lichess-org/lila

Events

Introduced

Fixed

0d5002696ae705e1888bf77de107c73de57bb1b3

Database specific

{
    "source": "REFERENCES"
}

Affected versions

Other

pre-bcrypt

pre-responsive

v1.*

v1.0.0

v1.1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35208.json"