What is CVE-2023-27866?

CVE-2023-27866 is a medium-severity vulnerability in IBM Informix Jdbc, classified under Code Injection. CVSS score: 6.3/10. Published 2023-06-28.

How severe is CVE-2023-27866?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in IBM Informix Jdbc

CVE-2023-27866

IBM Informix JDBC Driver 4.10 and 4.50 is susceptible to remote code execution attack via JNDI injection when driver code or the application using the driver do not verify supplied LDAP URL in Connect String. IBM X-Force ID: 249511.

Vulnerability class: RCE (Remote Code Execution)

Published 2023-06-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

IBM Informix Jdbc — versions 4.10, 4.50
IBM Informix Jdbc Driver — versions 4.10

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.ibm.com/support/pages/node/7007615 (vendor-advisory, Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/249511 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2023-27866?: CVE-2023-27866 is a medium-severity vulnerability in IBM Informix Jdbc, classified under Code Injection. CVSS score: 6.3/10. Published 2023-06-28.
How severe is CVE-2023-27866?: Medium severity. CVSS v3 base score is 6.3 out of 10.