Summary

RSA is aware of CVE-2026-111497 (also known as HTTP2Shell, Broccoli2Shell, Brotli2Shell, and Node2Shell), a buffer overflow in the Google Brotli decoder library (versions 1.0.3 through 1.0.9, 1.1.0, and 1.2.0). A specially crafted Brotli-compressed stream triggers an invalid block switch that the streaming decoder treats as a request for more input. The decoder keeps appending bytes to an eight-byte internal buffer and writes beyond its bounds, corrupting adjacent memory. Depending on the application, this can crash the process, expose memory contents, or enable remote code execution.

RSA has assessed its product portfolio. RSA Authentication Manager and RSA Governance & Lifecycle are potentially affected at low risk, through a third-party SUSE Linux component. RSA's own code and the Oracle components are not impacted. RSA will include product updates to the Brotli library in our next planned patch cycles.

Affected Products

Remediation

Apply the RSA patch as soon as it is released. No action is required for the other RSA products.

References

• BleepingComputer Coverage
• NVD: CVE-2026-111497

Legal Information
Read and use the information in this RSA Security Advisory to assist in avoiding any situation that might arise from the problems described herein. If you have any questions regarding this advisory, contact RSA Technical Support. RSA Security LLC and its affiliates, including without limitation, distribute RSA Security Advisories in order to bring to the attention of users of the affected RSA products, important security information.

RSA recommends that all users determine the applicability of this information to their individual situations and take appropriate action. The information set forth herein is provided "as is" without warranty of any kind. RSA disclaims all warranties, either express or implied, including the warranties of merchantability, fitness for a particular purpose, title and non-infringement.

In no event shall RSA, its affiliates or its suppliers, be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if RSA, its affiliates or its suppliers have been advised of the possibility of such damages. Some jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages, so the foregoing limitation may not apply.