CVE-2026-33621— pinchtab 安全漏洞
一分钟漏洞结论
影响对象
pinchtab pinchtab
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。
pinchtab是Pinchtab开源的一个AI代理浏览器控制工具。 pinchtab 0.7.7至0.8.4版本存在安全漏洞，该漏洞源于请求限制保护不完整，可能削弱纵深防御。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application
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一、 漏洞 CVE-2026-33621 基础信息
漏洞信息
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Vulnerability Title
PinchTab: Unapplied Rate Limiting Middleware Allows Unbounded Brute-Force of API Token
来源: CVE Program / CVE List V5
Vulnerability Description
PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab `v0.7.7` through `v0.8.4` contain incomplete request-throttling protections for auth-checkable endpoints. In `v0.7.7` through `v0.8.3`, a fully implemented `RateLimitMiddleware` existed in `internal/handlers/middleware.go` but was not inserted into the production HTTP handler chain, so requests were not subject to the intended per-IP throttle. In the same pre-`v0.8.4` range, the original limiter also keyed clients using `X-Forwarded-For`, which would have allowed client-controlled header spoofing if the middleware had been enabled. `v0.8.4` addressed those two issues by wiring the limiter into the live handler chain and switching the key to the immediate peer IP, but it still exempted `/health` and `/metrics` from rate limiting even though `/health` remained an auth-checkable endpoint when a token was configured. This issue weakens defense in depth for deployments where an attacker can reach the API, especially if a weak human-chosen token is used. It is not a direct authentication bypass or token disclosure issue by itself. PinchTab is documented as local-first by default and uses `127.0.0.1` plus a generated random token in the recommended setup. PinchTab's default deployment model is a local-first, user-controlled environment between the user and their agents; wider exposure is an intentional operator choice. This lowers practical risk in the default configuration, even though it does not by itself change the intrinsic base characteristics of the bug. This was fully addressed in `v0.8.5` by applying `RateLimitMiddleware` in the production handler chain, deriving the client address from the immediate peer IP instead of trusting forwarded headers by default, and removing the `/health` and `/metrics` exemption so auth-checkable endpoints are throttled as well.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
来源: CVE Program / CVE List V5
Vulnerability Title
pinchtab 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
pinchtab是Pinchtab开源的一个AI代理浏览器控制工具。 pinchtab 0.7.7至0.8.4版本存在安全漏洞，该漏洞源于请求限制保护不完整，可能削弱纵深防御。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-33621 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-33621 补丁与修复 (1)
CVE-2026-33621 其他参考 (1)
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Release v0.8.4 · pinchtab/pinchtab · GitHub x_refsource_MISC
同批安全公告 · pinchtab · 2026-03-26 · 共 5 条
| CVE-2026-33623 | 6.7 MEDIUM | pinchtab 资源管理错误漏洞 |
| CVE-2026-33620 | 4.3 MEDIUM | pinchtab 安全漏洞 |
| CVE-2026-33619 | 4.1 MEDIUM | pinchtab 代码问题漏洞 |
| CVE-2026-33622 | pinchtab 安全漏洞 |