CVE-2026-21883: Bokeh server applications have Incomplete Origin Validation in WebSockets
(updated )
This vulnerability allows for Cross-Site WebSocket Hijacking (CSWSH) of a deployed Bokeh server instance.
References
- aydinnyunus.github.io/2026/01/24/bokeh-websocket-hijacking-cve-2026-21883
- github.com/advisories/GHSA-793v-589g-574v
- github.com/bokeh/bokeh
- github.com/bokeh/bokeh/commit/cedd113b0e271b439dce768671685cf5f861812e
- github.com/bokeh/bokeh/security/advisories/GHSA-793v-589g-574v
- nvd.nist.gov/vuln/detail/CVE-2026-21883
Code Behaviors & Features
Detect and mitigate CVE-2026-21883 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →