Authorization bypass via spoofed MQTT client ID
Published Jul 10, 2026 · Updated Jul 10, 2026
Incorrect authorization in Sipeed PicoClaw 0.2.0 through 0.2.9 allows remote authenticated users to inject agent prompts via MQTT. The MQTT handler copies the client-controlled topic segment client_id into InboundContext.SenderID, and the common channel layer compares that value directly with allow_from instead of a broker-authenticated identity. Exploitation requires MQTT publishing access, an enabled MQTT channel, and a configured allow_from list; a spoofed allowed identifier reaches agent dispatch.
Summary
What happened
Incorrect authorization in Sipeed PicoClaw 0.2.0 through 0.2.9 allows remote authenticated users to inject agent prompts via MQTT. The MQTT handler copies the client-controlled topic segment client_id into InboundContext.SenderID, and the common channel layer compares that value directly with allow_from instead of a broker-authenticated identity. Exploitation requires MQTT publishing access, an enabled MQTT channel, and a configured allow_from list; a spoofed allowed identifier reaches agent dispatch.
The record
- CVE
- CVE-2026-15318
- Published
- Jul 10, 2026
- Updated
- Jul 10, 2026
- Vendor
- Sipeed
- Product
- PicoClaw
- Classifications
- CWE-863, CWE-285
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 10, 2026CVE publishedPublication date reported by the CVE source.
- Jul 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.2.0
- Affected versionversion=0.2.1
- Affected versionversion=0.2.2
- Affected versionversion=0.2.3
- Affected versionversion=0.2.4
- Affected versionversion=0.2.5
- Affected versionversion=0.2.6
- Affected versionversion=0.2.7
- Affected versionversion=0.2.8
- Affected versionversion=0.2.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- MQTT allow_from bypass reproduction harnessfunctional · demonstrated
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Technologies
Your stack
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Your stack
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