# CVE-2026-91100: HP Linux Imaging and Printing (HPLIP) Software– Multiple Vulnerabilities

> Attackers can exploit command injection flaws in HPLIP to execute code, escalate privileges, or cause denial of service on Linux systems.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 16 Sep 2026
- **Updated:** 17 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-91100, GHSA-c8c7-3cv3-4g6g, UBUNTU-CVE-2026-91100

## What is CVE-2026-91100?

CVE-2026-91100 is a medium-severity command injection vulnerability in HP Linux Imaging and Printing Software (HPLIP), published on 16 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-91100?

It affects 1 product.


Products: Hp Linux Imaging and Printing.

## How do I fix CVE-2026-91100?

Apply the vendor's patch.

## Is CVE-2026-91100 being exploited?

There is no known exploitation of CVE-2026-91100 in the wild and no public exploit code.

## Other vulnerabilities in HP Linux Imaging and Printing Software (HPLIP)

- [CVE-2026-91104](https://insights.sbomify.com/CVE-2026-91104/): HP Linux Imaging and Printing (HPLIP) Software– Multiple Vulnerabilities (critical 9.3)
- [CVE-2026-91106](https://insights.sbomify.com/CVE-2026-91106/): HP Linux Imaging and Printing (HPLIP) Software– Multiple Vulnerabilities (critical 9.3)
- [CVE-2026-8631](https://insights.sbomify.com/CVE-2026-8631/): HP Linux Imaging and Printing Software – Potential Escalation of Privilege and Arbitrary Code Execution (critical 9.3)
- [CVE-2026-91098](https://insights.sbomify.com/CVE-2026-91098/): HP Linux Imaging and Printing (HPLIP) Software– Multiple Vulnerabilities (high 8.6)
- [CVE-2026-91105](https://insights.sbomify.com/CVE-2026-91105/): HP Linux Imaging and Printing (HPLIP) Software– Multiple Vulnerabilities (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-91100 and fix it if it is affected.

What it is: CVE-2026-91100 is a medium-severity command injection vulnerability in HP Linux Imaging and Printing Software (HPLIP), published on 16 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-91100 in the wild and no public exploit code.

Affected product: HP Linux Imaging and Printing Software (HPLIP). 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-2026-91100/ (Markdown: https://insights.sbomify.com/CVE-2026-91100/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-91100
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-91100
- OSV: https://osv.dev/vulnerability/CVE-2026-91100

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-91100/
Summaries are generated and may contain mistakes; the official description above is the record.