PraisonAI: Authentication Bypass in OAuthManager.validate_token()
Priority HIGH 78CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
PraisonAI is a multi-agent teams system. Prior to version 4.5.97, OAuthManager.validate_token() returns True for any token not found in its internal store, which is empty by default. Any HTTP request to the MCP server with an arbitrary Bearer token is treated as authenticated, granting full access to all registered tools and agent capabilities. This issue has been patched in version 4.5.97.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0039 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed PraisonAI (MervinPraison): 4.5.97praisonai (PyPI): 4.5.97
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MervinPraison | PraisonAI | before 4.5.97 | 4.5.97 | Patch available | CNA |
| — | praisonai (PyPI) | before 4.5.97 | 4.5.97 | Patch available | GHSA-98f9-fqg5-hvq5 |
- PraisonAI VendorMervinPraison Affected before 4.5.97 Fixed in 4.5.97 Patch available CNA
- praisonai (PyPI) Vendor— Affected before 4.5.97 Fixed in 4.5.97 Patch available GHSA-98f9-fqg5-hvq5
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* | before 4.5.97 | Vulnerable | MervinPraison |
- cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* Versions before 4.5.97 Vulnerable ·MervinPraison
Remediation
- Fix · CNA PraisonAI (MervinPraison) Fixed in 4.5.97
- Fix · GHSA-98f9-fqg5-hvq5 praisonai (PyPI) Fixed in 4.5.97 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34953
- 2026-10-03 Alias added: GHSA-98f9-fqg5-hvq5
References
More MervinPraison Praisonai vulnerabilities
- TI-2026-30083 Incomplete fix for CVE-2026-34935: Command Injection in MervinPraison/PraisonAI CVSS 3.1CRITICAL 9.8
- TI-2026-29070 PraisonAI: Critical RCE via `type: job` workflow YAML CVSS 3.1CRITICAL 9.8
- TI-2026-28940 PraisonAI has Server-Side Request Forgery via Unvalidated webhook_url in Jobs API CVSS 3.1CRITICAL 10.0
- TI-2026-28768 PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading CVSS 3.1CRITICAL 9.8
- TI-2026-27159 PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command() CVSS 3.1CRITICAL 9.8
- TI-2026-27158 PraisonAI: Second-Order SQL Injection in `get_all_user_threads` CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-34953 · CVE Program
- CVE-2026-34953 · NVD
- FIRST EPSS
- GHSA-98f9-fqg5-hvq5 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences