What is CVE-2026-55532?

CVE-2026-55532 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Origin Validation Error. CVSS score: 7.6/10. Published 2026-08-25.

How severe is CVE-2026-55532?

High severity. CVSS v3 base score is 7.6 out of 10.

CSRF in Mervinpraison Praisonai

CVE-2026-55532

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, MCP HTTP Stream _validate_origin uses request_origin.startswith(allowed), allowing the attacker-controlled localhost.attacker.com HTTP origin to satisfy the localhost allowlist. A webpage can send Content-Type: text/plain requests without preflight and invoke tools/call without an API key, including file writes that persist agent instructions. This issue is fixed in version 4.6.58.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L.

Affected products

Mervinpraison Praisonai — versions < 4.6.58

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55532?: CVE-2026-55532 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Origin Validation Error. CVSS score: 7.6/10. Published 2026-08-25.
How severe is CVE-2026-55532?: High severity. CVSS v3 base score is 7.6 out of 10.