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

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

- **Severity:** High 8.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H`)
- **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 available:** No
- **Published:** 19 Aug 2026
- **Updated:** 20 Aug 2026
- **Also known as:** GHSA-pghq-9pjf-cfhf

## 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 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-18848?

It affects 9 products.


Products: 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, Ibm Power System S914 \(9009-41g\) Firmware, Ibm Power System S922 \(9009-22g\) Firmware, Ibm Power System S924 \(9009-42g\) Firmware.

## 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.

## Other vulnerabilities in IBM Power Systems Firmware

- [CVE-2026-16687](https://insights.sbomify.com/CVE-2026-16687/): Power System Buffer Overflow (critical 9.6)
- [CVE-2026-16835](https://insights.sbomify.com/CVE-2026-16835/): Power System Improper Certificate Validation (critical 9.6)
- [CVE-2026-16832](https://insights.sbomify.com/CVE-2026-16832/): Power System Buffer Overflow (high 8.4)
- [CVE-2026-16828](https://insights.sbomify.com/CVE-2026-16828/): Power System Out-of-bounds Read (high 7.6)
- [CVE-2026-93306](https://insights.sbomify.com/CVE-2026-93306/): This Power System update is being released to address (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18848 and fix it if it is affected.

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

Affected product: IBM Power Systems Firmware. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-18848/ (Markdown: https://insights.sbomify.com/CVE-2026-18848/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18848
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18848
- OSV: https://osv.dev/vulnerability/CVE-2026-18848

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18848/
Summaries are generated and may contain mistakes; the official description above is the record.