What is CVE-2025-36418?

CVE-2025-36418 is a high-severity vulnerability in IBM Applinx, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.3/10. Published 2026-01-20.

How severe is CVE-2025-36418?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in IBM Applinx

CVE-2025-36418

IBM ApplinX 11.1 is vulnerable due to a privilege escalation vulnerability due to improper verification of JWT tokens. An attacker may be able to craft or modify a JSON web token in order to impersonate another user or to elevate their privileges.

Published 2026-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (5.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

IBM Applinx — versions 11.1, 11.1.0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

www.ibm.com/support/pages/node/7257446 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-36418?: CVE-2025-36418 is a high-severity vulnerability in IBM Applinx, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.3/10. Published 2026-01-20.
How severe is CVE-2025-36418?: High severity. CVSS v3 base score is 7.3 out of 10.