https://seclists.org/oss-sec/2026/q4/389: Brotli CVE-2026-111497

Published Oct 26, 2026
·
Updated

Affected Software

1 affected component
Google Brotli

Frequently Asked Questions

1

Is an updated Brotli library release available?

Yes. Google Brotli v1.2.1 has been published for the library itself.

2

Which downstream projects should be reviewed for bundled or incorporated Brotli copies?

The supplied information identifies Node.js, Bun, Envoy Proxy, Istio, .NET runtime, Chromium, Firefox, Ghostscript, PHP brotli extension, Ruby brotli gem, and many other projects as incorporating Brotli. Review the dependency or bundled-source status of software that includes Brotli rather than assuming only a system-installed library is relevant.

3

Are any downstream products known to have incorporated the fix before the vulnerability was announced?

Yes. Some products may have pulled in the relevant Google Brotli changes before disclosure. Ghostscript is cited as appearing to include the fix in its bundled Brotli copy in the 10.07.1rc1 release.

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