What is CVE-2026-55539?

CVE-2026-55539 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-08-25.

How severe is CVE-2026-55539?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Mervinpraison Praisonai

CVE-2026-55539

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.51, the Jobs API create_app function mounts /api/v1/runs without authentication. Any reachable caller can submit jobs, read results, cancel runs, or delete jobs using operator credentials. The fix adds PRAISONAI_JOBS_API_KEY middleware for Authorization or X-API-Key. This issue is fixed in version 4.6.58.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

Affected products

Mervinpraison Praisonai — versions < 4.6.58

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

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-2026-55539?: CVE-2026-55539 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-08-25.
How severe is CVE-2026-55539?: High severity. CVSS v3 base score is 8.6 out of 10.