CVE-2026-91101: hp inc. hp linux imaging and printing software (hplip) Improper Validation of Array Index

Vulnerability summary

CVE-2026-91101 is a critical (CVSS 9.8) Improper Validation of Array Index vulnerability in hp inc. hp linux imaging and printing software (hplip). EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61% of scored vulnerabilities.

Timeline

1. 16-09-2026
   PublishedVulnerability first disclosed.
2. 17-09-2026
   Last modifiedVulnerability information updated.

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.

• CWE-129Improper Validation of Array IndexThe product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.