CVE-2026-34935

PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 0.82 % · percentile 57 (2026-10-27)
State: PUBLISHED
Published: 2026-04-03
Updated: 2026-04-06
Assigner: GitHub_M
NVD status: Analyzed

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-78

Advisories

GHSA-9gm9-c8mq-vq7m — PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()
PYSEC-2026-471 — PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

European references

ENISA EUVD · EUVD-2026-18913
GCVE · GCVE-0-2026-34935

Affected configurations (NVD CPE)

cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* ≥ 4.5.15 < 4.5.69

Affected products

Product	Versions
MervinPraison · PraisonAI	affected >= 4.5.15, < 4.5.69

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD