Critical 9.8Published Apr 3, 2026

CVE-2026-34935PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

Updated under an hour ago (Oct 26, 2026, 6:00 PM ET)

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It affects MervinPraison PraisonAI and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for MervinPraison PraisonAI

Exploited in the last 30 days

PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS command execution as the process user. This issue has been patched in version 4.5.69.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

MervinPraison PraisonAI mervinpraison:praisonai (from the name)	from 4.5.15, < 4.5.69	CNA record
praison praisonai praison:praisonai	from 4.5.15 before 4.5.69	NVD

References

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-9gm9-c8mq-vq7m	x-refsource-confirm, exploit, vendor-advisory
https://github.com/MervinPraison/PraisonAI/commit/47bff65413beaa3c21bf633c1fae4e684348368c	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.