CVE-2026-40160 MervinPraison CVE debrief

Who should care

Defenders responsible for PraisonAIAgents installations, especially those with default configurations, should assess exposure and prioritize upgrading to version 1.5.128 or later. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure and plan for remediation.

Why it matters

CVE-2026-40160 is a vulnerability in PraisonAIAgents that allows access to internal services and cloud metadata endpoints. Defenders should prioritize verifying exposure and upgrading to version 1.5.128 or later.

• Potential access to internal services and cloud metadata endpoints.
• Possible exposure of sensitive information.
• Need for verification of PraisonAIAgents installations.
• Priority for upgrading to version 1.5.128 or later.

Technical summary

PraisonAIAgents, a multi-agent teams system, has a vulnerability that allows an attacker to access internal services, cloud metadata endpoints, and localhost by tricking an LLM agent into crawling an internal URL. The vulnerability is due to the web_crawl's httpx fallback path passing user-supplied URLs directly to httpx.AsyncClient.get() with follow_redirects=True and no host validation. This fallback is the default crawl path on a fresh PraisonAI installation.

Defensive priority

Defenders should prioritize verifying exposure of PraisonAIAgents installations, especially those with default configurations, and upgrade to version 1.5.128 or later.

Recommended defensive actions

• Verify exposure of PraisonAIAgents installations, especially those with default configurations.
• Upgrade to version 1.5.128 or later.
• Monitor for suspicious activity on internal services and cloud metadata endpoints.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The vulnerability is described in the CVE record and NVD vulnerability detail page. The fix is mentioned in the CVE record and vendor advisory. The CVE record was published on 2026-04-10T17:17:13.950Z and has not been modified since then. The vulnerability allows access to internal services and cloud metadata endpoints. The PraisonAIAgents system is affected by this vulnerability, which can be exploited by tricking an LLM agent into crawling an internal URL.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.