Auth bypass in Openbmc Phosphor-Net-Ipmid
CVE-2026-16140
OpenBMC's IPMI implementation, phosphor-net-ipmid, is vulnerable to a logic flaw where the authorization context of an existing session can be replaced with a target account while still maintaining the original integrity and encryption keys. Several downstream vendors implement phosphor-net-ipmid as their IPMI stack, such as NVIDIA and H3C. This issue effectively allows for privilege escalation without re-authentication.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.3% 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: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- 44488dab-36db-4358-99f9-bc116477f914 (third-party-advisory)
- 44488dab-36db-4358-99f9-bc116477f914 (related)
Frequently asked questions
- What is CVE-2026-16140?
- CVE-2026-16140 is a high-severity vulnerability in Openbmc Phosphor-Net-Ipmid, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-09-15.
- How severe is CVE-2026-16140?
- High severity. CVSS v3 base score is 8.8 out of 10.