RLSA-2026:99212: Important: perl-CGI security update
CGI.pm is a stable, complete and mature solution for processing and preparing HTTP requests and responses. Major features including processing form submissions, file uploads, reading and writing cookies, query string generation and manipulation, and processing and preparing HTTP headers. Some HTML generation utilities are included as well. CGI.pm performs very well in in a vanilla CGI.pm environment and also comes with built-in support for modperl and modperl2 as well as FastCGI.
Security Fix(es):
perl-cgi: perl-cgi: Denial of Service via unenforced request and upload limits (CVE-2026-120650)
perl-cgi: perl-cgi: arbitrary file write via unsanitized upload filenames (CVE-2026-120641)
perl-cgi: perl-cgi: Security feature bypass via untainted request parameters (CVE-2026-120642)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/perl-CGIto a version that resolves this vulnerability.Fixed in 0:4.61-5.el10_3.1
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Does exploitation require an authenticated user or user interaction?
No. The advisory’s vector indicates network reachability, no privileges required, and no user interaction required. Exploitation is rated as high complexity.
Which application behavior is most relevant to exposure?
Applications using CGI.pm to process HTTP requests and file uploads are relevant, because the listed issues involve request and upload limits, upload filenames, and request-parameter handling.
What are the potential outcomes if the issues are exploited?
The listed issues can cause denial of service, arbitrary file writes, and bypass of a security feature. The advisory rates the overall impact as high for confidentiality, integrity, and availability.