CVE-2026-34955: PraisonAI Has Sandbox Escape via shell=True and Bypassable Blocklist in SubprocessSandbox

April 1, 2026 (updated April 6, 2026)

SubprocessSandbox in all modes (BASIC, STRICT, NETWORK_ISOLATED) calls subprocess.run() with shell=True and relies solely on string-pattern matching to block dangerous commands. The blocklist does not include sh or bash as standalone executables, allowing trivial sandbox escape in STRICT mode via sh -c '<command>'.

References

github.com/MervinPraison/PraisonAI
github.com/MervinPraison/PraisonAI/security/advisories/GHSA-r4f2-3m54-pp7q
github.com/advisories/GHSA-r4f2-3m54-pp7q
nvd.nist.gov/vuln/detail/CVE-2026-34955

Code Behaviors & Features

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