Auth bypass in Sipeed Picoclaw
CVE-2026-15318
A weakness has been identified in Sipeed PicoClaw up to 0.2.9. Affected by this issue is some unknown functionality of the file pkg/channels/mqtt/mqtt.go of the component MQTT Channel Handler. This manipulation of the argument client_id causes incorrect authorization. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The reported GitHub issue was closed automatically due to inactivity.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (28.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Sipeed Picoclaw — versions 0.2.0, 0.2.1, 0.2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/377258 (technical-description, vdb-entry)
- vuldb.com/vuln/377258/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-15318 (third-party-advisory)
- vuldb.com/submit/852879 (third-party-advisory)
- github.com/sipeed/picoclaw/issues/3068 (issue-tracking, exploit)
- github.com/sipeed/picoclaw/ (product)
Frequently asked questions
- What is CVE-2026-15318?
- CVE-2026-15318 is a medium-severity vulnerability in Sipeed Picoclaw, classified under Improper Authorization. CVSS score: 6.3/10. Published 2026-07-10.
- How severe is CVE-2026-15318?
- Medium severity. CVSS v3 base score is 6.3 out of 10.