CVE-2026-92811: Information Disclosure (CVSS 6.5)

Description

browserless versions 1.44.0 through 2.56.7 fail to enforce file protocol restrictions in Playwright websocket endpoints, allowing authenticated token holders to read arbitrary files. Attackers can navigate Playwright-driven browsers to file scheme URLs and access files accessible to the container process despite the ALLOW_FILE_PROTOCOL setting defaulting to false.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-200 CWE-200

References

Other References

https://github.com/browserless/browserless https://github.com/browserless/browserless/blob/v2.50.1/src/browsers/browsers.cdp.ts#L105-L135 https://github.com/browserless/browserless/blob/v2.50.1/src/browsers/browsers.playwright.ts https://github.com/geo-chen/oss/blob/main/browserless.md https://www.vulncheck.com/advisories/browserless-1.44.0-through-2.56.7-file-protocol-restriction-bypass

Frequently Asked Questions

What is CVE-2026-92811? +

browserless versions 1.44.0 through 2.56.7 fail to enforce file protocol restrictions in Playwright websocket endpoints, allowing authenticated token holders to read arbitrary files. Attackers can navigate Playwright-driven browsers to file scheme URLs and access files accessible to the container process despite the ALLOW_FILE_PROTOCOL setting defaulting to false. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-92811? +

CVE-2026-92811 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2026-92811? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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