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CVE-2026-16198— Sipeed PicoClaw First Run Setup access_control.go authentication bypass

Quick assessment

Affected
Sipeed PicoClaw
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sipeed picoclaw是Sipeed公司的嵌入式服务器。 Sipeed PicoClaw存在授权问题漏洞，该漏洞源于First Run Setup组件的文件web/backend/middleware/access_control.go中未知函数对参数allowed_cidrs的操作，可能导致使用替代通道进行身份验证绕过。

CVSS 5.6 · Medium EPSS 0.63% · P49

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 10

VendorProduct Version RangeStatus
Sipeed PicoClaw 0.2.0 affected
0.2.1 affected
0.2.2 affected
0.2.3 affected
0.2.4 affected
0.2.5 affected
0.2.6 affected
0.2.7 affected
… +2 more rows
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I. Basic Information for CVE-2026-16198

Vulnerability Information
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Vulnerability Title
Sipeed PicoClaw First Run Setup access_control.go authentication bypass
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in Sipeed PicoClaw up to 0.2.9. The impacted element is an unknown function of the file web/backend/middleware/access_control.go of the component First Run Setup. Performing a manipulation of the argument allowed_cidrs results in authentication bypass using alternate channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is regarded as difficult. The exploit is now public and may be used. The patch is named 017601354be38cb027ff3ffb01aed79bd5d12610. Applying a patch is the recommended action to fix this issue.
Source: 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:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Sipeed PicoClaw 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sipeed picoclaw是Sipeed公司的嵌入式服务器。 Sipeed PicoClaw存在授权问题漏洞，该漏洞源于First Run Setup组件的文件web/backend/middleware/access_control.go中未知函数对参数allowed_cidrs的操作，可能导致使用替代通道进行身份验证绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Sipeed PicoClaw 0.2.0 cpe:2.3:a:sipeed:picoclaw:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-16198

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-16198

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Patches & Fixes for CVE-2026-16198 (2)

Vendor Advisories for CVE-2026-16198 (1)

Same Patch Batch · Sipeed · 2026-07-18 · 9 CVEs total

CVE-2026-16084 7.3 HIGH Sipeed PicoClaw web.go web_fetch server-side request forgery
CVE-2026-16195 6.3 MEDIUM Sipeed PicoClaw Group Message wecom.go dispatchIncoming authorization
CVE-2026-16196 6.3 MEDIUM Sipeed PicoClaw web_fetch web.go isPrivateOrRestrictedIP server-side request forgery
CVE-2026-16197 6.3 MEDIUM Sipeed PicoClaw Group Message feishu_64.go handleMessageReceive authorization
CVE-2026-16083 5.3 MEDIUM Sipeed PicoClaw LINE Webhook line.go webhook.ParseRequest authentication replay
CVE-2026-16082 5.3 MEDIUM Sipeed PicoClaw pipeline_execute.go ExecTool.executeRun toctou
CVE-2026-16085 5.3 MEDIUM Sipeed PicoClaw context.go NewContextBuilder inclusion of functionality from untrusted con
CVE-2026-16081 4.3 MEDIUM Sipeed PicoClaw auth.go cross-site request forgery

IV. Related Vulnerabilities

Same product: PicoClaw
Same vendor: Sipeed
Same weakness: CWE-288

V. Comments for CVE-2026-16198

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