# CVE-2026-45776: Open XDMoD has Broken Access Control via Client-Controlled Session Variable

> Attackers can bypass access controls to view other users' compute job metrics if the optional SUPReMM module is enabled.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Jun 2026
- **Updated:** 5 Jun 2026
- **Also known as:** GHSA-3hfh-m242-8rmh

## What is CVE-2026-45776?

CVE-2026-45776 is a medium-severity missing authorization vulnerability in ubccr xdmod, published on 5 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Prior to version 11.0.3, a flaw in Open XDMoD's access control logic allows an attacker to submit a crafted HTTPS POST request that sets a session variable used for authorization decisions. If an installation of Open XDMoD includes the optional Job Performance (SUPReMM) module, an attacker could bypass intended data access restrictions and view other users' compute job efficiency metrics. All deployments of Open XDMoD prior to version 11.0.3 that contain the optional Job Performance (SUPReMM) module are impacted. This issue was reported privately on 2026-04-06, and at this time there is no evidence that this vulnerability has been exploited in the wild. The vulnerability was patched in Open XDMoD 11.0.3 on 2026-05-12. As a workaround, apply the patch manually.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-45776?

It affects 1 product.


Products: Buffalo Open Xdmod.

## How do I fix CVE-2026-45776?

No fix has been published for CVE-2026-45776 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-45776 being exploited?

There is no known exploitation of CVE-2026-45776 in the wild and no public exploit code.

## Other vulnerabilities in ubccr xdmod

- [CVE-2018-16988](https://insights.sbomify.com/CVE-2018-16988/): Auth bypass in n/a (critical 9.8)
- [CVE-2026-45777](https://insights.sbomify.com/CVE-2026-45777/): Open XDMoD Vulnerable to Unauthenticated Remote Code Execution (RCE) via OS Command Injection (critical 9.3)
- [CVE-2026-45779](https://insights.sbomify.com/CVE-2026-45779/): Open XDMoD Vulnerable to Unauthenticated SQL Injection Leading to Full Database Compromise (critical 9.3)
- [CVE-2026-45778](https://insights.sbomify.com/CVE-2026-45778/): Open XDMoD Vulnerable to Reflected Cross-Site Scripting (XSS) in Password Reset (high 8.6)
- [CVE-2018-16961](https://insights.sbomify.com/CVE-2018-16961/): Path traversal in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45776 and fix it if it is affected.

What it is: CVE-2026-45776 is a medium-severity missing authorization vulnerability in ubccr xdmod, published on 5 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-45776 in the wild and no public exploit code.

Affected product: ubccr xdmod. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-45776/ (Markdown: https://insights.sbomify.com/CVE-2026-45776/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45776
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45776
- OSV: https://osv.dev/vulnerability/CVE-2026-45776

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45776/
Summaries are generated and may contain mistakes; the official description above is the record.