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CVE-2026-32993: HTTP Header Injection in cPanel
平台
cpanel
组件
cpanel
修复版本
11.136.1.12
CVE-2026-32993 is a high-severity vulnerability affecting cPanel versions 11.132.0.0 through 11.136.1.12. This vulnerability stems from improper input sanitization within the /unprotected/nova_error endpoint, allowing an unauthenticated attacker to inject arbitrary HTTP headers into the server's response. Successful exploitation could lead to redirection attacks or other malicious actions, compromising the integrity of the web server and potentially impacting hosted websites.
影响与攻击场景翻译中…
The impact of CVE-2026-32993 is significant due to its unauthenticated nature and the potential for HTTP header injection. An attacker could leverage this vulnerability to redirect users to malicious websites (phishing), inject tracking headers for data exfiltration, or even modify the server's behavior by manipulating response headers. This could lead to credential theft, malware distribution, or defacement of hosted websites. The lack of authentication lowers the barrier to entry, making it accessible to a wider range of attackers. The /unprotected/nova_error endpoint is often overlooked in security assessments, making this a particularly concerning vulnerability.
利用背景翻译中…
CVE-2026-32993 was published on May 13, 2026. Its severity is rated HIGH (CVSS 8.3). Currently, there are no publicly known active campaigns exploiting this vulnerability. No KEV or EPSS score is available at this time. Monitor security advisories and threat intelligence feeds for any indications of exploitation.
威胁情报
漏洞利用状态
CISA SSVC
CVSS 向量
这些指标意味着什么？
- Attack Vector
- 网络 — 可通过互联网远程利用，无需物理或本地访问。攻击面最大。
- Attack Complexity
- 低 — 无需特殊条件，可以稳定地利用漏洞。
- Privileges Required
- 无 — 无需认证，无需凭证即可利用。
- User Interaction
- 无 — 攻击自动且无声，受害者无需任何操作。
- Scope
- 已改变 — 攻击可以超出脆弱组件，影响其他系统。
- Confidentiality
- 低 — 可访问部分数据。
- Integrity
- 低 — 攻击者可修改部分数据，影响有限。
- Availability
- 低 — 部分或间歇性拒绝服务。
受影响的软件
弱点分类 (CWE)
时间线
- 已保留
- 发布日期
- 修改日期
缓解措施和替代方案翻译中…
The primary mitigation for CVE-2026-32993 is to upgrade cPanel to version 11.136.1.12 or later, which contains the necessary fix. If immediate upgrade is not possible, consider implementing a Web Application Firewall (WAF) rule to block requests containing suspicious characters or patterns in the status query parameter of the /unprotected/novaerror endpoint. Alternatively, restrict access to the /unprotected/novaerror endpoint to trusted networks or IP addresses. Thoroughly review and harden cPanel's configuration, ensuring that all unnecessary features and endpoints are disabled. After upgrading, confirm the fix by attempting to inject a custom HTTP header via the /unprotected/nova_error endpoint; the request should be rejected.
修复方法翻译中…
Actualice cPanel a la versión 11.132.0.32 o posterior, 11.134.0.26 o posterior, 11.136.0.10 o posterior, o 11.136.1.12 o posterior para mitigar la vulnerabilidad. La actualización corrige la falta de sanitización adecuada del parámetro de consulta 'status' en el endpoint '/unprotected/nova_error', previniendo la inyección de encabezados HTTP arbitrarios.
常见问题翻译中…
What is CVE-2026-32993 — HTTP Header Injection in cPanel?
CVE-2026-32993 is a high-severity vulnerability in cPanel versions 11.132.0.0–11.136.1.12 that allows unauthenticated attackers to inject arbitrary HTTP headers via the /unprotected/nova_error endpoint, potentially leading to redirection or data exfiltration.
Am I affected by CVE-2026-32993 in cPanel?
You are affected if you are running cPanel versions 11.132.0.0 through 11.136.1.12. Check your cPanel version using /usr/local/cpanel/cpversion.
How do I fix CVE-2026-32993 in cPanel?
Upgrade cPanel to version 11.136.1.12 or later. As a temporary workaround, implement a WAF rule to block suspicious requests to the /unprotected/nova_error endpoint.
Is CVE-2026-32993 being actively exploited?
Currently, there are no publicly known active campaigns exploiting CVE-2026-32993, but it's crucial to apply the patch promptly.
Where can I find the official cPanel advisory for CVE-2026-32993?
Refer to the official cPanel security advisory for CVE-2026-32993 on the cPanel website (https://security.cpanel.net/ - search for CVE-2026-32993).
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