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Marimo: Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass

🗓️ 08 Apr 2026 21:50:58Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 6 Views

Marimo <=0.20.4 allows unauthenticated remote code execution via /terminal/ws by skipping authentication.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
GithubExploit		Exploit for Missing Authentication for Critical Function in Coreweave Marimo
4 May 202610:54
–githubexploit
GithubExploit		Exploit for Missing Authentication for Critical Function in Coreweave Marimo
25 Apr 202616:50
–githubexploit
GithubExploit		Exploit for CVE-2026-39987
13 Apr 202618:06
–githubexploit
GithubExploit		Exploit for Missing Authentication for Critical Function in Coreweave Marimo
16 May 202601:10
–githubexploit
GithubExploit		Exploit for Missing Authentication for Critical Function in Coreweave Marimo
2 Jun 202608:37
–githubexploit
GithubExploit		Exploit for Missing Authentication for Critical Function in Coreweave Marimo
26 Apr 202605:54
–githubexploit
GithubExploit		Exploit for CVE-2026-39987
18 Apr 202607:46
–githubexploit
GithubExploit		Exploit for Missing Authentication for Critical Function in Coreweave Marimo
4 May 202610:54
–githubexploit
GithubExploit		Exploit for CVE-2026-39987
15 Apr 202608:09
–githubexploit
GithubExploit		Exploit for CVE-2026-39987
13 Apr 202623:34
–githubexploit
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Vulners
Node
coreweavemarimoRange<0.23.0pip

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27 Apr 2026 16:30Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.19.8
CVSS 49.3
EPSS0.82174
SSVC
CWE-306
marimo vulnerabilitypre authenticationremote code executionterminal websocketauthentication bypasswebsocket endpoint
6