CVE-2026-77751— MISP MISP-STIX 路径遍历漏洞
一分钟漏洞结论
影响对象
misp misp-stix
利用判断
存在公开或 AI PoC，应优先验证
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。
MISP-STIX是MISP组织的一个用于处理 MISP 和 STIX 格式之间转换的 Python 库。 MISP MISP-STIX 2026.7.8及之前版本存在路径遍历漏洞，该漏洞源于处理MISP对象模板名称时存在路径遍历问题，可能导致攻击者通过构造包含路径分隔符或遍历序列的对象名称，使模板解析逃逸预期目录并加载其他位置的definition.json文件，造成数据泄露和对象元数据修改。
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一、 漏洞 CVE-2026-77751 基础信息
漏洞信息
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Vulnerability Title
Path Traversal in MISP Object Template Resolution During STIX Import and Export in misp-stix library
来源: CVE Program / CVE List V5
Vulnerability Description
A path traversal vulnerability existed in the handling of MISP object template names during STIX 2 import and MISP-to-STIX 2 export.
MISP object names are passed to PyMISP's object-template resolution mechanism, which constructs a filesystem path by joining the configured MISP object-template directory, the object name, and definition.json. An object name originating from untrusted STIX or MISP content was not sufficiently restricted before being used in this filesystem path.
An attacker able to supply a crafted object name containing path separators or traversal sequences such as ../ could therefore cause template resolution to escape the expected template directory and attempt to load a definition.json file from another location accessible to the process.
During STIX 2 import, an attacker-controlled x_misp_name from a custom STIX object could directly reach this template-resolution mechanism.
The issue could also become persistent. A malicious object name stored in a MISP event could later be processed again during STIX 2 export. Consequently, content originally introduced in one security context could trigger filesystem access later when the event is exported by a process operating with different or greater privileges.
If a suitable definition.json file exists outside the intended template directory, its contents may be interpreted as a MISP object template and fields from that file copied into the converted object. This can result in unintended disclosure of locally accessible data represented by the template file and modification of the resulting object's metadata or semantics.
The patches introduce strict validation of object-template names. Valid names are restricted to a single path component containing letters, digits, hyphens, or underscores. Names that do not meet these requirements are replaced with the generic unknown-template name before reaching PyMISP template resolution. The original rejected name is preserved in the object's comment and a warning is generated, preventing traversal while retaining the source information.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
Vulnerability Title
MISP MISP-STIX 路径遍历漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
MISP-STIX是MISP组织的一个用于处理 MISP 和 STIX 格式之间转换的 Python 库。 MISP MISP-STIX 2026.7.8及之前版本存在路径遍历漏洞，该漏洞源于处理MISP对象模板名称时存在路径遍历问题，可能导致攻击者通过构造包含路径分隔符或遍历序列的对象名称，使模板解析逃逸预期目录并加载其他位置的definition.json文件，造成数据泄露和对象元数据修改。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-77751 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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已实测靶场
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完整可执行 POC 代码
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三、漏洞 CVE-2026-77751 的情报信息
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CVE-2026-77751 补丁与修复 (2)
同批安全公告 · misp · 2026-08-21 · 共 4 条
| CVE-2026-77755 | 8.7 HIGH | MISP MISP-STIX 资源管理错误漏洞 |
| CVE-2026-77710 | 6.9 MEDIUM | MISP MISP-STIX 输入验证错误漏洞 |
| CVE-2026-77761 | 6.3 MEDIUM | MISP MISP-STIX 资源管理错误漏洞 |