CVE-2026-39889: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in MervinPraison PraisonAI
CVE-2026-39889 is a high-severity vulnerability in MervinPraison's PraisonAI multi-agent teams system prior to version 4. 5. 115. The vulnerability involves the A2U (Agent-to-User) event stream server exposing all agent activity without requiring authentication. Several endpoints related to agent-to-user communication are registered without authentication checks, potentially allowing unauthorized actors to access sensitive information. This issue is fixed in version 4. 5. 115. The vulnerability has a CVSS score of 7. 5, indicating a high impact on confidentiality but no impact on integrity or availability.
AI Analysis
Technical Summary
In PraisonAI versions before 4.5.115, the A2U event stream server exposes agent activity through multiple endpoints (/a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health) without any authentication. This results in an exposure of sensitive information to unauthorized actors, classified under CWE-200 (Exposure of Sensitive Information). The vulnerability is addressed in version 4.5.115, which implements proper authentication checks on these endpoints.
Potential Impact
Unauthorized actors can access sensitive agent activity data from the A2U event stream server without authentication, leading to a confidentiality breach. There is no impact on integrity or availability. The vulnerability is rated high severity with a CVSS score of 7.5.
Mitigation Recommendations
Upgrade PraisonAI to version 4.5.115 or later, where this vulnerability is fixed by adding authentication checks to the affected endpoints. Since no official patch link or advisory is provided, confirm the upgrade availability with the vendor or official sources. Patch status is not yet confirmed beyond the version fix note; verify with vendor advisory for current remediation guidance.
CVE-2026-39889: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in MervinPraison PraisonAI
Description
CVE-2026-39889 is a high-severity vulnerability in MervinPraison's PraisonAI multi-agent teams system prior to version 4. 5. 115. The vulnerability involves the A2U (Agent-to-User) event stream server exposing all agent activity without requiring authentication. Several endpoints related to agent-to-user communication are registered without authentication checks, potentially allowing unauthorized actors to access sensitive information. This issue is fixed in version 4. 5. 115. The vulnerability has a CVSS score of 7. 5, indicating a high impact on confidentiality but no impact on integrity or availability.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In PraisonAI versions before 4.5.115, the A2U event stream server exposes agent activity through multiple endpoints (/a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health) without any authentication. This results in an exposure of sensitive information to unauthorized actors, classified under CWE-200 (Exposure of Sensitive Information). The vulnerability is addressed in version 4.5.115, which implements proper authentication checks on these endpoints.
Potential Impact
Unauthorized actors can access sensitive agent activity data from the A2U event stream server without authentication, leading to a confidentiality breach. There is no impact on integrity or availability. The vulnerability is rated high severity with a CVSS score of 7.5.
Mitigation Recommendations
Upgrade PraisonAI to version 4.5.115 or later, where this vulnerability is fixed by adding authentication checks to the affected endpoints. Since no official patch link or advisory is provided, confirm the upgrade availability with the vendor or official sources. Patch status is not yet confirmed beyond the version fix note; verify with vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-07T20:32:03.011Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d6c32c1cc7ad14dab1ab44
Added to database: 4/8/2026, 9:05:48 PM
Last enriched: 4/8/2026, 9:21:00 PM
Last updated: 4/8/2026, 11:22:39 PM
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.