What is CVE-2026-40313?

CVE-2026-40313 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 9.1/10. Published 2026-04-14.

How severe is CVE-2026-40313?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Mervinpraison Praisonai

CVE-2026-40313

PraisonAI is a multi-agent teams system. In versions 4.5.139 and below, the GitHub Actions workflows are vulnerable to ArtiPACKED attack, a known credential leakage vector caused by using actions/checkout without setting persist-credentials: false. By default, actions/checkout writes the GITHUB_TOKEN (and sometimes ACTIONS_RUNTIME_TOKEN) into the .git/config file for persistence, and if any subsequent workflow step uploads artifacts (build outputs, logs, test results, etc.), these tokens can be inadvertently included. Since PraisonAI is a public repository, any user with read access can download these artifacts and extract the leaked tokens, potentially enabling an attacker to push malicious code, poison releases and PyPI/Docker packages, steal repository secrets, and execute a full supply chain compromise affecting all downstream users. The issue spans numerous workflow and action files across .github/workflows/ and .github/actions/. This issue has been fixed in version 4.5.140.

Published 2026-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Mervinpraison Praisonai — versions < 4.5.140
Praison Praisonai

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

github.com/MervinPraison/PraisonAI/security/advisories/GHSA-3959-6v5q-45q2 (Vendor Advisory)
thehackernews.com/2024/08/github-vulnerability-artipacked-exposes.html (Press/Media Coverage)
unit42.paloaltonetworks.com/github-repo-artifacts-leak-tokens (Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2026-40313?: CVE-2026-40313 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 9.1/10. Published 2026-04-14.
How severe is CVE-2026-40313?: Critical severity. CVSS v3 base score is 9.1 out of 10.