CVE-2026-18343 IBM i is Affected By An Improper Privilege Management Vulnerability
Medium 4.4
Published
Updated
Check this codebase for CVE-2026-18343 and fix it if it is affected.
What it is: CVE-2026-18343 is a medium-severity vulnerability in Ibm I, published on 12 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18343 in the wild and no public exploit code.
Affected product: Ibm I. 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-2026-18343/ (Markdown: https://insights.sbomify.com/CVE-2026-18343/index.md)
A local attacker can modify the BOOTP table due to improper authorization, leading to privilege escalation in IBM i.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18343?
CVE-2026-18343 is a medium-severity vulnerability in Ibm I, published on 12 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
IBM i 7.3, 7.4, 7.5, and 7.6 could allow a local attacker to modify the BOOTP table due to improper authorization.
Weakness: CWE-269
Which versions are affected by CVE-2026-18343?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-18343?
No fix has been published for CVE-2026-18343 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18343 being exploited?
There is no known exploitation of CVE-2026-18343 in the wild and no public exploit code.
Other vulnerabilities in Ibm I
- CVE-2026-96119 IBM i is Affected By An Improper Control of Code Generation Vulnerability in HTTP Server Administration GUI
- CVE-2026-16860 IBM i is Affected By Remote Code Execution Vulnerability []
- CVE-2026-17083 IBM i is Affected By Multiple Vulnerabilities in the Debug Server
- CVE-2026-17218 IBM i is Affected By Remote Code Execution Vulnerability in Line Printer Daemon []
- CVE-2026-17276 IBM i is Affected By Multiple Vulnerabilities in Navigator for i
Sources
Also known as GHSA-q83c-9gx5-f3gp.