CVE-2026-63379— Libevent HTTP 头走私漏洞
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一、 漏洞 CVE-2026-63379 基础信息
漏洞信息
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Vulnerability Title
Libevent: HTTP Header smuggling
来源: CVE Program / CVE List V5
Vulnerability Description
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttp_read_trailer and merges them into request headers. The fix introduces evhttp_parse_headers_impl_ and a temporary trailer header list. An unauthenticated remote attacker can place security-sensitive fields in trailers so that an upstream proxy and the libevent application interpret different effective headers, enabling header smuggling, authorization bypass, proxy-header spoofing, or cache poisoning. The fix parses trailers into a temporary header list and discards them instead of merging them into req->input_headers. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-63379 的公开POC
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CVE-2026-63379 补丁与修复 (2)
CVE-2026-63379 厂商安全公告 (1)
- 🔗 HTTP Header smuggling · Advisory · libevent/libevent · GitHubx_refsource_CONFIRM
CVE-2026-63379 厂商页面 (2)
同批安全公告 · libevent · 2026-08-20 · 共 10 条
| CVE-2026-63382 | 9.2 CRITICAL | libevent evhttp HTTP解析器缺陷致请求走私漏洞 |
| CVE-2026-63385 | 9.2 CRITICAL | Libevent HTTP 头处理缺陷可导致访问控制绕过 |
| CVE-2026-63384 | 8.7 HIGH | Libevent evtag_unmarshal_header 存在整数溢出漏洞 |
| CVE-2026-63383 | 8.7 HIGH | Libevent decode_tag_internal() 越界读取漏洞 |
| CVE-2026-63388 | 8.4 HIGH | Libevent AF_UNIX堆缓冲区越界写入漏洞 |
| CVE-2026-63495 | 7.5 HIGH | Libevent WebSocket 服务端分片帧内存溢出漏洞 |
| CVE-2026-63387 | 7.0 HIGH | Libevent DNS服务器响应DNS名称标签栈缓冲区溢出漏洞 |
| CVE-2026-63381 | 5.8 MEDIUM | Libevent evbuffer_add_buffer_reference悬挂指针漏洞 |
| CVE-2026-63380 | 5.7 MEDIUM | Libevent evws_new_session 空指针解引用漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-63379
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