What is CVE-2026-16243?

CVE-2026-16243 is a high-severity vulnerability in Eclipse Omr, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-07-21.

How severe is CVE-2026-16243?

High severity. CVSS v3 base score is 7.5 out of 10.

Out-of-bounds Read in Eclipse Omr

CVE-2026-16243

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.

Vulnerability class: Buffer Overflow

Published 2026-07-21 · last modified 2026-08-11.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.0th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Eclipse Omr
Eclipse Foundation Omr — versions 0.1, 0, 0.11

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/eclipse-omr/omr/pull/8348 (Patch, Issue Tracking)
github.com/eclipse-omr/omr/pull/8349 (Patch, Issue Tracking)
gitlab.eclipse.org/security/cve-assignment/-/work_items/195 (Broken Link)

Frequently asked questions

What is CVE-2026-16243?: CVE-2026-16243 is a high-severity vulnerability in Eclipse Omr, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-07-21.
How severe is CVE-2026-16243?: High severity. CVSS v3 base score is 7.5 out of 10.