Auth bypass in Sipeed Picoclaw
CVE-2026-16083
A security flaw has been discovered in Sipeed PicoClaw up to 0.2.9. This affects the function webhook.ParseRequest of the file pkg/channels/line/line.go of the component LINE Webhook. The manipulation results in authentication bypass by capture-replay. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The reported GitHub issue was closed automatically with the label "not planned" by a bot.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Sipeed Picoclaw — versions 0.2.0, 0.2.1, 0.2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/379795 (technical-description, vdb-entry)
- vuldb.com/vuln/379795/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-16083 (third-party-advisory)
- vuldb.com/submit/852945 (third-party-advisory)
- github.com/sipeed/picoclaw/issues/3073 (issue-tracking, exploit)
- github.com/sipeed/picoclaw/ (product)
Frequently asked questions
- What is CVE-2026-16083?
- CVE-2026-16083 is a medium-severity vulnerability in Sipeed Picoclaw, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-07-18.
- How severe is CVE-2026-16083?
- Medium severity. CVSS v3 base score is 5.3 out of 10.