What is CVE-2026-1243?

CVE-2026-1243 is a medium-severity vulnerability in Ibm Aix, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-02.

How severe is CVE-2026-1243?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Ibm Aix

CVE-2026-1243

IBM Content Navigator 3.0.15, 3.1.0, and 3.2.0 is vulnerable to cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (11.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Ibm Aix
Ibm Content Navigator — versions 3.0.15, 3.1.0, 3.2.0
Ibm Content_navigator — versions 3.0.15, 3.1.0, 3.2.0
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-1243?: CVE-2026-1243 is a medium-severity vulnerability in Ibm Aix, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-02.
How severe is CVE-2026-1243?: Medium severity. CVSS v3 base score is 5.4 out of 10.