CVE-2026-97689— urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into memory
一分钟漏洞结论
影响对象
urllib3 urllib3
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。
urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a le
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一、 漏洞 CVE-2026-97689 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into memory
来源: CVE Program / CVE List V5
Vulnerability Description
urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
来源: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-97689 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-97689 其他参考 (3)
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https://github.com/urllib3/urllib3/releases/tag/2.8.0 x_refsource_MISC
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https://github.com/urllib3/urllib3/security/advisories/GHSA-vxq7-64xx-v4gw x_refsource_CONFIRM
同批安全公告 · urllib3 · 2026-09-29 · 共 3 条
| CVE-2026-97687 | 7.6 HIGH | urllib3: HTTPS proxy TLS configuration may be ignored or overridden |
| CVE-2026-97688 | 6.9 MEDIUM | urllib3: Chunked Deflate streaming can enter an infinite loop |
IV. Related Vulnerabilities
Same weakness: CWE-770
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CVE-2026-35189
Excessive Memory Allocation in Relative CRLDP Processing -
CVE-2026-101917
PyJWT JWK客户端未知kid值放大未认证JWKS获取漏洞
V. Comments for CVE-2026-97689
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