CVE-2026-18341 IBM i is Affected By Buffer Overflow Vulnerability []
Medium 6.3
Published
Updated
Check this codebase for CVE-2026-18341 and fix it if it is affected.
What it is: CVE-2026-18341 is a medium-severity vulnerability in Ibm I, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18341 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-2026-18341/ (Markdown: https://insights.sbomify.com/CVE-2026-18341/index.md)
A remote authenticated attacker can exploit an integer underflow in IBM i to corrupt memory, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18341?
CVE-2026-18341 is a medium-severity vulnerability in Ibm I, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to corrupt memory due to an integer underflow.
Which versions are affected by CVE-2026-18341?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-18341?
No fix has been published for CVE-2026-18341 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18341 being exploited?
There is no known exploitation of CVE-2026-18341 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-phqr-rc26-gp39.