CVE-2026-73494— Blaze Java 解析器请求走私漏洞
一分钟漏洞结论
影响对象
http4s blaze
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。
原文： > blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. Prior to 0.23.18 and from 1.0.0-M1 until 1.0.0-M42, five HTTP/1.1 conformance laxities in the hand-written Java parser under http/src/main/java/org/http4s/blaze/htt
可能的 ATT&CK 技术 3 AI
T1557.002 · ARP Cache Poisoning T1029 · Scheduled Transfer T1040 · Network Sniffing影响版本矩阵 7
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| http4s | blaze | < 0.23.18 |
affected |
>= 1.0.0-M1, < 1.0.0-M42 |
affected | ||
| org.http4s | blaze-http_2.13 | < 0.23.18 |
affected |
>= 1.0.0-M1, < 1.0.0-M42 |
affected | ||
| org.http4s | blaze-http_3 | < 0.23.18 |
affected |
>= 1.0.0-M1, < 1.0.0-M42 |
affected | ||
| org.http4s | http4s-blaze-server_2.13 | < 0.23.18 |
affected |
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一、 漏洞 CVE-2026-73494 基础信息
漏洞信息
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Vulnerability Title
blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze's Java wire parser
来源: CVE Program / CVE List V5
Vulnerability Description
blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. Prior to 0.23.18 and from 1.0.0-M1 until 1.0.0-M42, five HTTP/1.1 conformance laxities in the hand-written Java parser under http/src/main/java/org/http4s/blaze/http/parser/ can cause blaze to derive a different request boundary than a stricter fronting intermediary. A default BlazeServerBuilder accepts invalid or valueless header field names that violate tchar syntax, obsolete folded field lines (obs-fold), unsupported Transfer-Encoding values, duplicate Content-Length fields, and requests containing both Transfer-Encoding and Content-Length. If a lenient or legacy proxy forwards the malformed bytes but interprets them differently, the disagreement can permit front-end authorization bypass, response-queue poisoning on pooled backend connections, or cache poisoning. Exploitation requires a pair of disagreeing parsers; no non-default blaze configuration is required. The affected checks are enforced in BodyAndHeaderParser and Http1ServerParser. This issue is fixed in versions 0.23.18 and 1.0.0-M42.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A: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
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| http4s | blaze | < 0.23.18 | - |
|
| org.http4s | blaze-http_2.13 | < 0.23.18 | - |
|
| org.http4s | blaze-http_3 | < 0.23.18 | - |
|
| org.http4s | http4s-blaze-server_2.13 | < 0.23.18 | - |
|
二、漏洞 CVE-2026-73494 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2026-73494 补丁与修复 (6)
CVE-2026-73494 厂商安全公告 (1)
CVE-2026-73494 厂商页面 (2)
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🔗 Release v1.0.0-M42 · http4s/blaze · GitHub x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2026-73494
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