CVE-2026-16243 Eclipse OMR : arraycmp SIMD implementation does not check if the number of bytes to compare is zero
Medium 5.7
Published
Updated
Check this codebase for CVE-2026-16243 and fix it if it is affected.
What it is: CVE-2026-16243 is a medium-severity vulnerability in Eclipse OMR, published on 21 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-16243 in the wild and no public exploit code.
Affected product: Eclipse OMR. 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-2026-16243/ (Markdown: https://insights.sbomify.com/CVE-2026-16243/index.md)
Attackers can cause a denial of service in applications using Eclipse OMR by triggering a null dereference in the array comparison logic.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-16243?
CVE-2026-16243 is a medium-severity vulnerability in Eclipse OMR, published on 21 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In Eclipse OMR versions up to 0.11, the arraycmp SIMD implementation for Z and P does not check if the number of bytes to compare is zero.
Weakness: CWE-125
Which versions are affected by CVE-2026-16243?
It affects 1 product.
Products include Eclipse Omr.
How do I fix CVE-2026-16243?
Upgrade to a fixed version.
Is CVE-2026-16243 being exploited?
There is no known exploitation of CVE-2026-16243 in the wild and no public exploit code.
Other vulnerabilities in Eclipse OMR
Sources
Also known as GHSA-c5v6-97gv-39fw.