What is CVE-2026-9136?

CVE-2026-9136 is a medium-severity vulnerability in Misp, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-20.

How severe is CVE-2026-9136?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Misp

CVE-2026-9136

A vulnerability was identified in the ShadowAttribute proposal creation workflow. The add action accepted user-controlled ShadowAttribute request data without removing the id field before saving the record. Because the underlying framework…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (8.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Misp — versions 2.5.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

5a6e4751-2f3f-4070-9419-94fb35b644e8 (Patch, patch)

Frequently asked questions

What is CVE-2026-9136?: CVE-2026-9136 is a medium-severity vulnerability in Misp, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-20.
How severe is CVE-2026-9136?: Medium severity. CVSS v3 base score is 6.5 out of 10.