CVE-2026-34955: high-severity vulnerability in MervinPraison PraisonAI
PraisonAI: Sandbox Escape via shell=True and Bypassable Blocklist in SubprocessSandbox
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.4%
PraisonAI is a multi-agent teams system. Prior to version 4.5.97, 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>'. This issue has been patched in version 4.5.97.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
MervinPraison · PraisonAIRelated CVEs — MervinPraison PraisonAI
In the same product, most dangerous first.
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