High severity8.8NVD Advisory· Published Jul 1, 2021· Updated Jun 17, 2026
CVE-2020-36406
CVE-2020-36406
Description
uWebSockets 18.11.0 and 18.12.0 has a stack-based buffer overflow in uWS::TopicTree::trimTree (called from uWS::TopicTree::unsubscribeAll). NOTE: the vendor's position is that this is "a minor issue or not even an issue at all" because the developer of an application (that uses uWebSockets) should not be allowing the large number of triggered topics to accumulate
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4cpe:2.3:a:uwebsockets_project:uwebsockets:18.11.0:*:*:*:*:node.js:*:*+ 1 more
- cpe:2.3:a:uwebsockets_project:uwebsockets:18.11.0:*:*:*:*:node.js:*:*
- cpe:2.3:a:uwebsockets_project:uwebsockets:18.12.0:*:*:*:*:node.js:*:*
- uWebSockets/uWebSocketsdescription
- Range: 18.11.0, 18.12.0
Patches
Vulnerability mechanics
References
3- github.com/uNetworking/uWebSockets/commit/03fca626a95130ab80f86adada54b29d27242759nvdPatchThird Party Advisory
- bugs.chromium.org/p/oss-fuzz/issues/detailnvdExploitIssue TrackingPatchThird Party Advisory
- github.com/google/oss-fuzz-vulns/blob/main/vulns/uwebsockets/OSV-2020-1695.yamlnvdThird Party Advisory
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