What is CVE-2026-18489?

CVE-2026-18489 is a high-severity vulnerability in IBM Contextforge, classified under CWE-488. CVSS score: 7.4/10. Published 2026-09-04.

How severe is CVE-2026-18489?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in IBM Contextforge

CVE-2026-18489

IBM ContextForge MCP Gateway - Translate utility <= 1.0.8 MCP Context Forge could allow a remote attacker to obtain sensitive information from other sessions due to exposure of data elements to the wrong session.

Published 2026-09-04 · last modified 2026-09-15.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.2th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

IBM Contextforge
IBM Contextforge Mcp Gateway - Translate Utility — versions <= 1.0.8

Weakness classification (CWE)

CWE-488

References

www.ibm.com/support/pages/node/7286056 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-18489?: CVE-2026-18489 is a high-severity vulnerability in IBM Contextforge, classified under CWE-488. CVSS score: 7.4/10. Published 2026-09-04.
How severe is CVE-2026-18489?: High severity. CVSS v3 base score is 7.4 out of 10.