CVE-2026-40288: Praison Praisonai command injection (CVSS 9.8)

Description

PraisonAI is a multi-agent teams system. In versions below 4.5.139 of PraisonAI and 1.5.140 of praisonaiagents, the workflow engine is vulnerable to arbitrary command and code execution through untrusted YAML files. When praisonai workflow run <file.yaml> loads a YAML file with type: job, the JobWorkflowExecutor in job_workflow.py processes steps that support run: (shell commands via subprocess.run()), script: (inline Python via exec()), and python: (arbitrary Python script execution)—all without any validation, sandboxing, or user confirmation. The affected code paths include action_run() in workflow.py and _exec_shell(), _exec_inline_python(), and _exec_python_script() in job_workflow.py. An attacker who can supply or influence a workflow YAML file (particularly in CI pipelines, shared repositories, or multi-tenant deployment environments) can achieve full arbitrary command execution on the host system, compromising the machine and any accessible data or credentials. This issue has been fixed in versions 4.5.139 of PraisonAI and 1.5.140 of praisonaiagents.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Praison Praisonai< 4.5.139

Praison Praisonaiagents< 1.5.140

Remediation

Fixed in

Praison Praisonai≥ 4.5.139

Praison Praisonaiagents≥ 1.5.140

Patch & vendor advisories

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-vc46-vw85-3wvm

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-vc46-vw85-3wvmExploitVendor Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-40288 being actively exploited?

CVE-2026-40288 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.92%.

How severe is CVE-2026-40288?

CVE-2026-40288 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.92% probability of exploitation.

Which products are affected by CVE-2026-40288?

Affected products include Praison Praisonai, Praison Praisonaiagents.

How do I fix CVE-2026-40288?

Upgrade affected software to a fixed version, for example Praison Praisonai 4.5.139, Praison Praisonaiagents 1.5.140 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40288 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo