Description
Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs apps. This affects the package sockjs before 0.3.20.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | sockjs | unspecified – < 0.3.20 | 0.3.20 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
andsnw/sockjs-dos-py ★ 1 · Jul 3, 2020
CVE-2020-7693: SockJS 0.3.19 Denial of Service POC
-
thewindghost/CVE-2020-7693 ★ 0 · Jan 13, 2026
POC For CVE-2020-7693 (Testing on Version sockjs@0.3.18)
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | sockjs | < 0.3.20 | 0.3.20 | GHSA-c9g6-9335-x697 |
References
- https://snyk.io/vuln/SNYK-JS-SOCKJS-575261
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-575448
- https://github.com/sockjs/sockjs-node/issues/252
- https://github.com/sockjs/sockjs-node/pull/265
- https://github.com/andsnw/sockjs-dos-py
- https://github.com/sockjs/sockjs-node/commit/dd7e642cd69ee74385825816d30642c43e051d16