PatchTheCVECVE-2026-13476: IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co
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HIGH 7.3REMOTEUPGRADE
CVE-2026-13476 is a high-severity flaw (CVSS 7.3) affecting informix dynamic server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary commands with service account privileges on the system due to improper validation of user supplied input.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.3 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 64%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Publisher (CNA): IBM Corporation · Vendor: ibm
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
ibm informix dynamic server UPGRADE
Affected: >= 15.0 and < 15.0.1.13 · 12.10 · 14.10
Fixed in: 15.0.1.13
Safe to downgrade to: a release before 12.10
1. Check installed version
apt-cache policy informix-dynamic-server || rpm -q informix-dynamic-server || informix-dynamic-server --version
2. UPGRADE to 15.0.1.13 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade informix-dynamic-server
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade informix-dynamic-server
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 12.10 (Debian / Ubuntu)
apt-cache madison informix-dynamic-server
sudo apt install informix-dynamic-server=<VERSION_BEFORE_12.10>
sudo apt-mark hold informix-dynamic-server
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list informix-dynamic-server
sudo dnf downgrade informix-dynamic-server-<VERSION_BEFORE_12.10>
sudo dnf versionlock add informix-dynamic-server
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.
Exact fixes by distribution
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
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.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
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- CVE-2026-13367 HIGH 7.8 DOWNGRADE IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s