CVE-2026-18848 Power System Cross-Site Request Forgery (CSRF)

High 8.3 Published 19 Aug 2026 Updated 20 Aug 2026

An attacker can trick a logged-in administrator into performing unauthorized administrative actions on the FSP via a crafted web page.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-18848?

CVE-2026-18848 is a high-severity vulnerability in IBM Power Systems Firmware, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the ASMI web interface. An attacker who can lure a logged-in ASMI administrator to visit a crafted web page can, under specific conditions, silently perform administrative actions on the FSP on behalf of that administrator, resulting in a confidentiality, integrity, and availability impact to the managed system.

Weakness: CWE-352

Which versions are affected by CVE-2026-18848?

It affects 9 products.

Products include Ibm Power System E1080 \(9080-Hex\) Firmware, Ibm Power System E1180 \(9080-Heu\) Firmware, Ibm Power System E950 \(9040-Mr9\) Firmware, Ibm Power System E980 \(9080-M9s\) Firmware, Ibm Power System H922 \(9223-22s\) Firmware, Ibm Power System H924 \(9223-42s\) Firmware and 3 more.

How do I fix CVE-2026-18848?

No fix has been published for CVE-2026-18848 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-18848 being exploited?

There is no known exploitation of CVE-2026-18848 in the wild and no public exploit code.

Sources

Also known as GHSA-pghq-9pjf-cfhf.