SB2026100820 - Multiple vulnerabilities in IBM PowerVC
Published: October 8, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Improper Output Neutralization for Logs (CVE-ID: CVE-2026-5078)
CWE-ID: CWE-117 - Improper Output Neutralization for Logs
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to forge log entries.
The vulnerability exists due to improper output neutralization for logs in the :remote-user token when processing a crafted Authorization header. A remote attacker can send a crafted Authorization: Basic header containing CR/LF characters to forge log entries.
The built-in combined, common, default, and short formats are affected, as well as custom formats that include :remote-user.
2) Improper Output Neutralization for Logs (CVE-ID: CVE-2026-15603)
CWE-ID: CWE-117 - Improper Output Neutralization for Logs
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to forge log entries.
The vulnerability exists due to improper output neutralization for logs in morgan access log token handling when logging attacker-controlled request data. A remote attacker can send crafted request values containing Unicode line separators to forge log entries.
The issue affects built-in formats including combined, common, default, and short, as well as custom formats. Downstream ECMAScript-aware or Unicode-aware log processing can split a single physical log record into multiple logical records.
Remediation
Install update from vendor's website.