CVE-2026-120631
perl-cgi: perl-cgi: Denial of Service via unescaped cookie expiration attribute
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · November 4, 2026
Updated · November 4, 2026
Description
A flaw was found in perl-cgi. A remote attacker can cause a Denial of Service (DoS) by sending an HTTP request with a specially crafted Cookie header containing a malformed expiration attribute. Because the cookie parser inserts this unescaped value directly into an internal regular expression (a pattern-matching rule), the input can cause the application to crash or become unresponsive due to excessive processing time.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1333 · Inefficient Regular Expression Complexity