What is CVE-2026-18486?

CVE-2026-18486 is a high-severity vulnerability in IBM Contextforge, classified under Information Disclosure. CVSS score: 8.8/10. Published 2026-09-04.

How severe is CVE-2026-18486?

High severity. CVSS v3 base score is 8.8 out of 10.

Information disclosure in IBM Contextforge

CVE-2026-18486

IBM ContextForge MCP Gateway <= v1.0.7 MCP Context Forge could allow a remote authenticated attacker to obtain sensitive credentials and escalate privileges due to improper validation of jq filters.

Vulnerability class: Information Disclosure

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

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (24.1th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.1% 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 — versions <= v1.0.7

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

www.ibm.com/support/pages/node/7286052 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-18486?: CVE-2026-18486 is a high-severity vulnerability in IBM Contextforge, classified under Information Disclosure. CVSS score: 8.8/10. Published 2026-09-04.
How severe is CVE-2026-18486?: High severity. CVSS v3 base score is 8.8 out of 10.