CVE-2026-93582— HTTP基本认证绕过漏洞
一分钟漏洞结论
影响对象
OTRS GmbH (former OTRS AG) OTRS
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
((OTRS)) 社区版 6 及更早版本中的 HTTP 基本认证模块存在身份验证绕过漏洞。该模块会从 或 环境变量中接受经过身份验证的用户名。在基于 CGI 和 mod_perl 的部署环境中，HTTP 请求头可能会被映射到对应的 环境变量。因此，未经认证的远程攻击者可以通过提供构造的 请求头，将该值暴露为 。当 HTTP 基本认证被配置为后端认证方式时，OTRS 会信任该值作为已认证的用户名，而不再进行额外的密码验证。攻击者因此可以在不知道相应凭据的情况下，通过通用接口（Generic Interface）冒充现
影响版本矩阵 7
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| OTRS GmbH (former OTRS AG) | ((OTRS)) Community Edition | 6.x |
affected |
| OTRS GmbH (former OTRS AG) | OTRS | 7.0.x |
unaffected |
8.0.x |
unaffected | ||
2023.x |
unaffected | ||
2024.x |
unaffected | ||
2025.x |
unaffected | ||
2026.x |
unaffected |
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一、 漏洞 CVE-2026-93582 基础信息
漏洞信息
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Vulnerability Title
Authentication Bypass via Spoofed Remote-User Header in HTTP Basic Authentication
来源: CVE Program / CVE List V5
Vulnerability Description
The HTTP Basic Authentication modules in ((OTRS)) Community Edition 6 and prior accept the authenticated username from either the REMOTE_USER or HTTP_REMOTE_USER environment variable. In CGI and mod_perl based deployments, HTTP request headers may be mapped to corresponding HTTP_* environment variables. As a result, an unauthenticated remote attacker can supply a crafted Remote-User request header which is exposed to the application as HTTP_REMOTE_USER. When HTTP Basic Authentication is configured as the authentication backend, OTRS trusts this value as an already authenticated username and does not perform an additional password verification. An attacker may therefore authenticate through the Generic Interface as an existing agent or customer user without knowing the corresponding credentials.
The resulting privileges depend on the account being impersonated. Successful exploitation may allow access to confidential information and modification of data or configuration with the permissions of the affected user. Exploitation requires HTTP Basic Authentication to be configured as an authentication backend and a web server environment in which attacker-controlled HTTP headers are exposed through the corresponding HTTP_* environment variables.
OTRS 7 and later are not affected by this attack vector due to the use of Mojolicious/Hypnotoad and does not expose arbitrary request headers through %ENV in the manner required for exploitation. The supported REMOTE_USER mechanism additionally requires validation through the configured SSO shared secret. The unused HTTP_REMOTE_USER fallback has nevertheless been removed as a security-hardening measure.
Please note that ((OTRS)) Community Edition 6.x and before are vulnerable. Products based on the ((OTRS)) Community Edition also very likely to be affected
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| OTRS GmbH (former OTRS AG) | OTRS | - | - |
|
| OTRS GmbH (former OTRS AG) | ((OTRS)) Community Edition | 6.x | - |
|
二、漏洞 CVE-2026-93582 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-93582 厂商安全公告 (1)
同批安全公告 · OTRS GmbH (former OTRS AG) · 2026-10-12 · 共 9 条
| CVE-2026-78357 | 9.1 CRITICAL | JWT认证会话撤销不足漏洞 |
| CVE-2026-78355 | 8.7 HIGH | SendSupportBundle 路径遍历漏洞，允许删除指定目录外的文件 |
| CVE-2026-93581 | 6.1 MEDIUM | CSV导出公式元素不足中和漏洞 |
| CVE-2026-48211 | 5.4 MEDIUM | 导入/导出管理控制台的跨站请求伪造漏洞 |
| CVE-2026-78359 | 5.4 MEDIUM | CustomerUser 多后端身份重复漏洞 |
| CVE-2026-78356 | 5.3 MEDIUM | Unauthenticated Disclosure of Agent Frontend Configuration -> 未授权披露代理前端配置 |
| CVE-2026-48212 | 4.8 MEDIUM | 外部页面存储型XSS漏洞 |
| CVE-2026-78358 | 4.3 MEDIUM | 管理操作跨站请求伪造漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-93582
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