CVE-2026-4918: IBM Guardium Data Protection 12.1 is vulnerable to stored cross-site scripting

Routine

MEDIUM 5.5DOWNGRADE

CVE-2026-4918 is a medium-severity flaw (CVSS 5.5) affecting guardium data protection. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Guardium Data Protection 12.1 is vulnerable to stored cross-site scripting. This vulnerability allows an administrative 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	5.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-23
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

2026-04-23 00:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

ibm guardium data protection DOWNGRADE

Affected: 12.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.1

1. Check installed version

apt-cache policy guardium-data-protection || rpm -q guardium-data-protection || guardium-data-protection --version

2. No fixed release: DOWNGRADE to a release before 12.1 (Debian / Ubuntu)

apt-cache madison guardium-data-protection sudo apt install guardium-data-protection=<VERSION_BEFORE_12.1> sudo apt-mark hold guardium-data-protection

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

dnf --showduplicates list guardium-data-protection sudo dnf downgrade guardium-data-protection-<VERSION_BEFORE_12.1> sudo dnf versionlock add guardium-data-protection

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-2026-4918?

guardium data protection: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-4918 being exploited?

CVE-2026-4918 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-2026-4918 affect?

CVE-2026-4918 affects guardium data protection. Severity is medium (CVSS 5.5). IBM Guardium Data Protection 12.1 is vulnerable to stored cross-site scripting. This vulnerability allows an administrative user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading t

How urgent is CVE-2026-4918?

Priority 20/100. No elevated risk signals yet.

Related CVEs

CVE-2026-4917 MEDIUM 4.9 DOWNGRADE IBM Guardium Data Protection 12.1 could allow an administrative user to traverse directories on the system

References

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