CVE-2026-91102 — Linux Imaging And Printing
CRITICALCVE-2026-91102 is a critical-severity (CVSS 9.8) OS Command Injection vulnerability in hp linux imaging and printing. A fix is available — see the affected versions and patch details below.
HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code…
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-91102.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-91102 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
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.
Affected Products
linux imaging and printinghpDetection & mitigation playbook
Vendor / applianceDetect
Inventory every hp linux imaging and printing deployment and check each version against the affected-products list above.
Fix
Apply the hp linux imaging and printing security patch or hotfix for CVE-2026-91102 on the affected version, following the vendor advisory for your exact build.
Workarounds
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
To reduce the attack surface, restrict network access to systems running HPLIP if network printing or remote management features are not actively used. Alternatively, if HPLIP functionality is not required, the `hplip` package can be removed. To remove the package: `sudo dnf remove hplip` Removing the package will impact printing capabilities for HP devices.Source: Red Hat security advisory for CVE-2026-91102 (CC BY 4.0)
Frequently Asked Questions
Is CVE-2026-91102 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.