Path Traversal in IBM Openbmc
CVE-2026-18849
IBM OpenBMC FW1060.00 through FW1060.80 is affected by a vulnerability in the BMC firmware update process. An attacker with authenticated administrator-level access to the BMC can, under specific conditions, execute arbitrary code, resulting in a confidentiality, integrity, and availability impact.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- IBM Openbmc
- IBM Power System E1050 \(9043-Mrx\) Firmware
- IBM Power System L1022 \(9786-22h\) Firmware
- IBM Power System L1024 \(9786-42h\) Firmware
- IBM Power System S1012 \(9028-21b\) Firmware
- IBM Power System S1014 \(9105-41b\) Firmware
- IBM Power System S1022 \(9105-22a\) Firmware
- IBM Power System S1022s \(9105-22b\) Firmware
- IBM Power System S1024 \(9105-42a\) Firmware
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7283590 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18849?
- CVE-2026-18849 is a medium-severity vulnerability in IBM Openbmc, classified under Path Traversal. CVSS score: 6.8/10. Published 2026-08-19.
- How severe is CVE-2026-18849?
- Medium severity. CVSS v3 base score is 6.8 out of 10.