CVE-2026-85725— LightRAG: Plaintext Passwords Compared Without Constant-Time Function
一分钟漏洞结论
影响对象
HKUDS LightRAG
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。
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, verify_password in lightrag/api/passwords.py compares plaintext AUTH_ACCOUNTS password values with Python's == operator. The comparison can return after the first mismatching byt
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一、 漏洞 CVE-2026-85725 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
LightRAG: Plaintext Passwords Compared Without Constant-Time Function
来源: CVE Program / CVE List V5
Vulnerability Description
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, verify_password in lightrag/api/passwords.py compares plaintext AUTH_ACCOUNTS password values with Python's == operator. The comparison can return after the first mismatching byte, creating response-time differences based on password length and matching prefixes. A network attacker with sufficiently low-latency access can repeatedly query the /login endpoint and use the timing oracle to recover a plaintext-configured password character by character. Deployments using bcrypt-prefixed password values are not affected by this comparison path. This issue is fixed in version 1.5.5.
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:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-85725 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-85725 补丁与修复 (2)
CVE-2026-85725 其他参考 (2)
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Release v1.5.5 · HKUDS/LightRAG · GitHub x_refsource_MISC
同批安全公告 · HKUDS · 2026-09-22 · 共 5 条
| CVE-2026-85734 | 9.1 CRITICAL | LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks |
| CVE-2026-85740 | 7.1 HIGH | LightRAG: SSRF via IPv6-transition address bypass (NAT64, IPv4-compatible, 6to4) of the na |
| CVE-2026-86062 | 6.1 MEDIUM | LightRAG: Stored Cross-Site Scripting (XSS) in the LightRAG WebUI chat/answer renderer via |
| CVE-2026-85709 | 5.3 MEDIUM | LightRAG: Sensitive Information Exposure Through Raw Exception Messages in API Error Respo |
IV. Related Vulnerabilities
Same product: LightRAG
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CVE-2026-86062
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CVE-2026-85740
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V. Comments for CVE-2026-85725
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