CVE-2026-1243: IBM Content Navigator 3.0.15, 3.1.0, and 3.2.0 is vulnerable to cross-site scripting

Routine

MEDIUM 5.4DOWNGRADE

CVE-2026-1243 is a medium-severity flaw (CVSS 5.4) affecting content navigator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-02
Last modified	2026-10-26

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-02 01:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

ibm content navigator DOWNGRADE

Affected: 3.0.15 · 3.1.0 · 3.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.15

1. Check installed version

apt-cache policy content-navigator || rpm -q content-navigator || content-navigator --version

2. No fixed release: DOWNGRADE to a release before 3.0.15 (Debian / Ubuntu)

apt-cache madison content-navigator sudo apt install content-navigator=<VERSION_BEFORE_3.0.15> sudo apt-mark hold content-navigator

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list content-navigator sudo dnf downgrade content-navigator-<VERSION_BEFORE_3.0.15> sudo dnf versionlock add content-navigator

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-1243?

content navigator: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-1243 being exploited?

CVE-2026-1243 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-1243 affect?

CVE-2026-1243 affects content navigator. Severity is medium (CVSS 5.4). 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 lead

How urgent is CVE-2026-1243?

Priority 22/100. No elevated risk signals yet.

References

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