Auth bypass in Diem-Project Diem
CVE-2026-86183
A vulnerability was identified in diem-project diem up to 5.1.3. This vulnerability affects unknown code of the file dmFrontPlugin/modules/dmWidget/lib/BasedmWidgetActions.class.php of the component dmWidget. Such manipulation of the argument widget_id leads to authorization bypass. The attack may be launched remotely. The exploit is publicly available and might be used. The name of the patch is 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. A patch should be applied to remediate this issue. The project was informed of the problem early through an issue report but has not responded yet.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% 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: 0.006 · change: +0.002
Affected products
- Diem-Project Diem — versions 5.1.0, 5.1.1, 5.1.2
Weakness classification (CWE)
References
- github.com/diem-project/diem/ (product)
- github.com/diem-project/diem/issues/450 (issue-tracking, exploit)
- vuldb.com/cve/CVE-2026-86183 (third-party-advisory)
- vuldb.com/submit/896155 (third-party-advisory)
- vuldb.com/vuln/399315 (technical-description, vdb-entry)
- vuldb.com/vuln/399315/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-86183?
- CVE-2026-86183 is a medium-severity vulnerability in Diem-Project Diem, classified under Improper Authorization. CVSS score: 5.3/10. Published 2026-09-06.
- How severe is CVE-2026-86183?
- Medium severity. CVSS v3 base score is 5.3 out of 10.