CVE-2026-42561 漏洞深度分析

漏洞概述

CVE 编号： CVE-2026-42561
CVSS 评分： 7.5（HIGH）
CVSS 向量： CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE 分类： CWE-770,CWE-606
漏洞状态： Deferred
发布时间： 2026-05-13T21:16:47.070
最后更新： 2026-07-14T12:17:06.383

漏洞描述

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.27, python-multipart has a denial of service vulnerability in multipart part header parsing. When parsing multipart/form-data, MultipartParser previously had no limit on the number of part headers or the size of an individual part header. An attacker could send a request with either many repeated headers without terminating the header block or a single very large header value, causing excessive CPU work before request rejection or completion. This vulnerability is fixed in 0.0.27.

影响分析

此漏洞的具体影响取决于实际利用场景。"

修复建议

1. 及时关注厂商发布的安全更新和补丁
2. 升级受影响组件到最新版本
3. 如无法立即升级，参考厂商提供的临时缓解措施
4. 加强网络访问控制和监控

参考链接

1. https://github.com/Kludex/python-multipart/security/advisories/GHSA-pp6c-gr5w-3c5g
2. https://access.redhat.com/errata/RHSA-2026:37275
3. https://access.redhat.com/security/cve/CVE-2026-42561
4. https://bugzilla.redhat.com/show_bug.cgi?id=2477309
5. https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42561.json