CVE-2026-97687— urllib3: HTTPS proxy TLS configuration may be ignored or overridden
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 1.26.0 until 2.8.0, the proxy_ssl_context, proxy_assert_hostname, proxy_assert_fingerprint, ssl_context, cert_reqs, verify_mode, use_forwarding_for_https=True, and CERT_NONE configuration paths fail to remain
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一、 漏洞 CVE-2026-97687 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: HTTPS proxy TLS configuration may be ignored or overridden
来源: CVE Program / CVE List V5
Vulnerability Description
urllib3 is an HTTP client library for Python. From 1.26.0 until 2.8.0, the proxy_ssl_context, proxy_assert_hostname, proxy_assert_fingerprint, ssl_context, cert_reqs, verify_mode, use_forwarding_for_https=True, and CERT_NONE configuration paths fail to remain separated because target-server TLS settings are incorrectly applied to the HTTPS proxy connection. The trigger is that an application uses an HTTPS proxy and configures target-server TLS settings that must remain separate from the proxy TLS handshake, including HTTPS forwarding with target-specific identity or credentials. Applying cert_reqs=CERT_NONE can overwrite proxy_ssl_context.verify_mode in place, and the mutation persists so later connections reusing the same context may connect to the HTTPS proxy without certificate verification. The attack mechanism is that an attacker intercepts and impersonates the HTTPS proxy after the effective proxy policy accepts the attacker's certificate. The impact is that the attacker can observe or modify forwarded traffic or receive a target TLS client certificate, while CONNECT tunneling still preserves the separate end-to-end target TLS connection. 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:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-97687 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-97687 其他参考 (5)
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https://github.com/urllib3/urllib3/pull/5093 x_refsource_MISC
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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-8988-9cw3-xx77 x_refsource_CONFIRM
同批安全公告 · urllib3 · 2026-09-29 · 共 3 条
| CVE-2026-97689 | 8.9 HIGH | urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into me |
| CVE-2026-97688 | 6.9 MEDIUM | urllib3: Chunked Deflate streaming can enter an infinite loop |
IV. Related Vulnerabilities
V. Comments for CVE-2026-97687
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