What is CVE-2026-44881?

CVE-2026-44881 is a critical-severity vulnerability in Portainer, classified under Improper Link Resolution Before File Access. CVSS score: 9.9/10. Published 2026-05-28.

How severe is CVE-2026-44881?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Information disclosure in Portainer

CVE-2026-44881

Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8, 2.39.2, and 2.41.0, Portainer su…

EPSS: 0.001 (20.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Portainer — versions 2.40.0, >= 2.39.0, < 2.39.2, >= 2.40.0, < 2.41.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-44881?: CVE-2026-44881 is a critical-severity vulnerability in Portainer, classified under Improper Link Resolution Before File Access. CVSS score: 9.9/10. Published 2026-05-28.
How severe is CVE-2026-44881?: Critical severity. CVSS v3 base score is 9.9 out of 10.