CVE-2026-55535 MervinPraison CVE debrief

Who should care

Defenders responsible for PraisonAI deployments should assess exposure and prioritize updates to version 4.6.58 or later. Defenders should verify PraisonAI version and update to 4.6.58 or later, and assess exposure of internal addresses. The vulnerability allows an attacker to bypass validation and potentially access internal addresses, which could lead to unauthorized access or other security breaches.

Why it matters

CVE-2026-55535 is a vulnerability in PraisonAI's multi-agent teams system that allows an attacker to bypass validation and potentially access internal addresses. Defenders should prioritize verifying and updating PraisonAI to version 4.6.58 or later, and assess exposure of internal addresses.

• Potential access to internal addresses
• Verification of PraisonAI version and exposure
• Monitoring for potential abuse

Technical summary

The Jobs API's validate_webhook_url() path in PraisonAI fails open on socket.gaierror and does not bind the validated address to the later request, allowing an attacker to potentially access internal addresses. This issue is fixed in version 4.6.58. The vulnerability allows an attacker to bypass validation and potentially access internal addresses, which could lead to unauthorized access or other security breaches. Defenders should prioritize verifying and updating PraisonAI to version 4.6.58 or later, and assess exposure of internal addresses.

Defensive priority

Defenders should prioritize verifying and updating PraisonAI to version 4.6.58 or later, and assess exposure of internal addresses.

Recommended defensive actions

• Verify PraisonAI version and update to 4.6.58 or later
• Assess exposure of internal addresses
• Monitor for potential abuse of internal addresses
• 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 CVE record and NVD entry provide details on the vulnerability, but do not specify which versions are affected or if exploitation has occurred. The vulnerability allows an attacker to bypass validation and potentially access internal addresses. Defenders should verify PraisonAI version and update to 4.6.58 or later, and assess exposure of internal addresses. The source grounding indicates that the vulnerability is in the Jobs API's validate_webhook_url() path. Evidence limits suggest that defenders should review compensating for 7

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.