CVSS 3.1
6.9 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:NCVE-2026-55529
Medium (6.9). EPSS 0.2% chance of exploitation in the next 30 days. Fixed in praisonai 4.6.58.
PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream _validate_origin method accepts request_origin.startswith(allowed), so the attacker-controlled localhost.evil.example HTTP origin matches the localhost allowlist. Without an API key, a malicious webpage can submit tools/call requests to the local MCP server and execute exposed tools. This issue is fixed in version 4.6.58.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-306, CWE-346
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wj6g-v78p-6fx3 | PyPI | praisonai | <4.6.58 | 4.6.58 |
| PYSEC-2026-3896 | PyPI | praisonai | <4.6.58 | 4.6.58 |
References
- https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1
- https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58
- https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wj6g-v78p-6fx3
- https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wj6g-v78p-6fx3