A critical vulnerability, identified as CVE-2026-42530 (CVSS Score: 9.2) , has been discovered in the NGINX HTTP/3 protocol. This flaw is categorized as a QPACK use-after-free issue, which can be exploited to achieve remote code execution (RCE). The attack vector involves manipulating environment template management API, requiring an attacker with capability to execute the exploit. A proof-of-concept attack has been publicly disclosed, highlighting the potential for malicious activity. The business impact of this vulnerability is significant, as it could allow unauthorized access and data manipulation, compromising system integrity and confidentiality.
We recommend you to update NGINX to version 1.31.2.[/subscribe_to_unlock_form]
A critical vulnerability, identified as CVE-2026-42530 (CVSS Score: 9.2) , has been discovered in the NGINX HTTP/3 protocol. This flaw is categorized as a QPACK use-after-free issue, which can be exploited to achieve remote code execution (RCE). The attack vector involves manipulating environment template management API, requiring an attacker with capability to execute the exploit. A proof-of-concept attack has been publicly disclosed, highlighting the potential for malicious activity. The business impact of this vulnerability is significant, as it could allow unauthorized access and data manipulation, compromising system integrity and confidentiality.
We recommend you to update NGINX to version 1.31.2.[emaillocker id="1283"]
The following reports contain further technical details:
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