CVE-2026-45777: OpenXDMoD is an open framework for collecting and analyzing HPC metrics

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-45777 is a critical-severity flaw (CVSS 9.8) affecting open xdmod. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Starting in version 9.5.0 and prior to version 11.0.3, an attacker can remotely execute arbitrary system commands on the web server hosting Open XDMoD with the privileges of the web server process. This could allow an attacker to read or modify application data, alter system configuration, or disrupt service availability. All deployments of Open XDMoD versions 9.5.0 through

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-06-05
Last modified	2026-07-23

Publisher (CNA): GitHub, Inc. · Vendor: buffalo

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-05 20:17 UTCPublished CVE record published
2026-07-23 07:10 UTCUpdated Record last modified

buffalo open xdmod UPGRADE

Affected: >= 9.5.0 and < 11.0.3

Fixed in: 11.0.3

Safe to downgrade to: a release before 9.5.0

1. Check installed version

apt-cache policy open-xdmod || rpm -q open-xdmod || open-xdmod --version

2. UPGRADE to 11.0.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-xdmod

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-xdmod

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 9.5.0 (Debian / Ubuntu)

apt-cache madison open-xdmod sudo apt install open-xdmod=<VERSION_BEFORE_9.5.0> sudo apt-mark hold open-xdmod

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list open-xdmod sudo dnf downgrade open-xdmod-<VERSION_BEFORE_9.5.0> sudo dnf versionlock add open-xdmod

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-2026-45777?

open xdmod: upgrade to 11.0.3. Exact commands for each OS are on this page.

Is CVE-2026-45777 being exploited?

CVE-2026-45777 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-2026-45777 affect?

CVE-2026-45777 affects open xdmod. Severity is critical (CVSS 9.8). OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Starting in version 9.5.0 and prior to version 11.0.3, an attacker can remotely execute arbitrary system commands on the web server hosting Open XDMoD with the privile

How urgent is CVE-2026-45777?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-45779 CRITICAL 9.8 UPGRADE OpenXDMoD is an open framework for collecting and analyzing HPC metrics
CVE-2026-45778 MEDIUM 5.4 UPGRADE OpenXDMoD is an open framework for collecting and analyzing HPC metrics
CVE-2026-45776 MEDIUM 4.3 UPGRADE OpenXDMoD is an open framework for collecting and analyzing HPC metrics

References

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