TI-2026-13539 Aliases CVE-2026-16198 GHSA-367p-r6p3-qqmv

Sipeed PicoClaw First Run Setup access_control.go authentication bypass

MEDIUM 61CWE-287Published 2026-07-18 · Updated 2026-07-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00634 50th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Sipeed	PicoClaw	0.2.0; 0.2.1; 0.2.2; 0.2.3; 0.2.4; 0.2.5; 0.2.6; 0.2.7; 0.2.8; 0.2.9	—	No fix listed	CNA

PicoClaw VendorSipeed Affected 0.2.0; 0.2.1; 0.2.2; 0.2.3; 0.2.4; 0.2.5; 0.2.6; 0.2.7; 0.2.8; 0.2.9 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sipeed:picoclaw::::::::	—	—	Sipeed

cpe:2.3:a:sipeed:picoclaw:*:*:*:*:*:*:*:* Versions — — ·Sipeed

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-16198
2026-10-03 Alias added: GHSA-367p-r6p3-qqmv
2026-10-25 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://github.com/sipeed/picoclaw/issues/3080

Patch 2

Other 1

https://github.com/sipeed/picoclaw/

TI-2026-13463 Sipeed PicoClaw web.go web_fetch server-side request forgery CVSS 4.0MEDIUM 6.9
TI-2026-13462 Sipeed PicoClaw LINE Webhook line.go webhook.ParseRequest authentication replay CVSS 4.0MEDIUM 6.9
TI-2026-12893 Sipeed PicoClaw Launcher access_control.go IPAllowlist access control CVSS 4.0MEDIUM 6.9
TI-2026-13538 Sipeed PicoClaw Group Message feishu_64.go handleMessageReceive authorization CVSS 4.0MEDIUM 5.3
TI-2026-13537 Sipeed PicoClaw web_fetch web.go isPrivateOrRestrictedIP server-side request forgery CVSS 4.0MEDIUM 5.3
TI-2026-13536 Sipeed PicoClaw Group Message wecom.go dispatchIncoming authorization CVSS 4.0MEDIUM 5.3

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences