We use optional cookies to improve your experience on our websites, such as through social media connections, and to display personalized advertising based on your online activity. If you reject optional cookies, only cookies necessary to provide you the services will be used. You may change your selection by clicking โManage Cookiesโ at the bottom of the page. Privacy Statement Third-Party Cookies AcceptRejectManage cookies MSRC ๎ฌ Customer Guidance ๎ฌ Security Update Guide ๎ฌ Vulnerabilities ๎ฌ CVE-2026-8450 HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file() NewRecently updated On this page ๎ CVE-2026-8450 ๎ Subscribe RSS PowerShell ๎ฅ API ๎ฅ CSAF Security Vulnerability Released: Jul 24, 2026 Last updated: Jul 27, 2026 Assigning CNA CPANSec CVE.org link CVE-2026-8450 ๏ Weakness CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CVSS Source NVD Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Metrics CVSS:3.1 9.1 / 9.1 ๎ฅ Base score metrics: 9.1 / Temporal score metrics: 9.1 ๎ฅฎ Expand all ๎ฅฐ Collapse all Metric Value ๎ฃฌ ๎ฅด Base score metrics(8) Attack Vector Network Attack Complexity Low Privileges Required None User Interaction None Scope Unchanged Confidentiality High Integrity High Availability None Please see Common Vulnerability Scoring System for more information on the definition of these metrics. Acknowledgements Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information. Security Updates To determine the support lifecycle for your software, see the Microsoft Support Lifecycle. Release date Descending ๎ Edit columns ๎ข Download ๎ Filters ๎ก Product Family ๎ Max Severity ๎ Impact ๎ Platform ๎ ๎ข Clear Release date ๎นฉ Product Platform Impact Max Severity Article Download Build Number Assigning CNA Title: Release date, Content: Jul 24, 2026 azl3 perl-HTTP-Daemon 6.16-1 Azure Linux 3.0 - Critical Title: Knowledge Base Articles for azl3 perl-HTTP-Daemon 6.16-1, Content:, 1 link CBL-Mariner Releases ๏ Title: Download Security Update for azl3 perl-HTTP-Daemon 6.16-1, Content:, 1 link Security Update Title: Build numbers, Content: 6.16-2 Title: Assigning CNA, Content: CPANSec All results loaded Loaded all 1 rows Disclaimer The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. Revisions version revisionDate description 2.0 Jul 27, 2026 Information published. 1.0 Jul 24, 2026 Information published. ๎น How satisfied are you with the MSRC Security Update Guide? Rating ๎ Broken ๎ช Bad ๎ Below average ๎ช Average ๎ฎ Great! ๎ข Your Privacy Choices Consumer Health Privacy Privacy & Cookies
CVE-2026-8450 is a critical OS command injection vulnerability (CVSS 9.1) in the Perl HTTP::Daemon module, where an attacker can execute arbitrary commands via the `send_file()` method. The vulnerability affects versions prior to 6.17, and users must upgrade to HTTP::Daemon version 6.17 to remediate the issue.