Local approval bypass via unauthenticated loopback webhook
Published Jul 26, 2026 · Updated Jul 26, 2026
Improper authorization in NanoCo NanoClaw 2.0.64 and earlier allows local users to force channel registration via a loopback webhook. The webhook in createChatSdkBridge.setup accepts unauthenticated POST bodies and trusts the body-supplied interaction.user.id during approval checks. A local process that can reach 127.0.0.1 while an approval is pending can impersonate its approver, wire a channel to a target agent group, and add the sender as a member.
Summary
What happened
Improper authorization in NanoCo NanoClaw 2.0.64 and earlier allows local users to force channel registration via a loopback webhook. The webhook in createChatSdkBridge.setup accepts unauthenticated POST bodies and trusts the body-supplied interaction.user.id during approval checks. A local process that can reach 127.0.0.1 while an approval is pending can impersonate its approver, wire a channel to a target agent group, and add the sender as a member.
The record
- CVE
- CVE-2026-17433
- Published
- Jul 26, 2026
- Updated
- Jul 26, 2026
- Vendor
- NanoCo
- Product
- NanoClaw
- Classifications
- CWE-285, CWE-266, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 26, 2026CVE publishedPublication date reported by the CVE source.
- Jul 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.0.0
- Affected versionversion=2.0.1
- Affected versionversion=2.0.10
- Affected versionversion=2.0.11
- Affected versionversion=2.0.12
- Affected versionversion=2.0.13
- Affected versionversion=2.0.14
- Affected versionversion=2.0.15
- Affected versionversion=2.0.16
- Affected versionversion=2.0.17
- Affected versionversion=2.0.18
- Affected versionversion=2.0.19
- Affected versionversion=2.0.2
- Affected versionversion=2.0.20
- Affected versionversion=2.0.21
- Affected versionversion=2.0.22
- Affected versionversion=2.0.23
- Affected versionversion=2.0.24
- Affected versionversion=2.0.25
- Affected versionversion=2.0.26
- Affected versionversion=2.0.27
- Affected versionversion=2.0.28
- Affected versionversion=2.0.29
- Affected versionversion=2.0.3
- Affected versionversion=2.0.30
- Affected versionversion=2.0.31
- Affected versionversion=2.0.32
- Affected versionversion=2.0.33
- Affected versionversion=2.0.34
- Affected versionversion=2.0.35
- Affected versionversion=2.0.36
- Affected versionversion=2.0.37
- Affected versionversion=2.0.38
- Affected versionversion=2.0.39
- Affected versionversion=2.0.4
- Affected versionversion=2.0.40
- Affected versionversion=2.0.41
- Affected versionversion=2.0.42
- Affected versionversion=2.0.43
- Affected versionversion=2.0.44
- Affected versionversion=2.0.45
- Affected versionversion=2.0.46
- Affected versionversion=2.0.47
- Affected versionversion=2.0.48
- Affected versionversion=2.0.49
- Affected versionversion=2.0.5
- Affected versionversion=2.0.50
- Affected versionversion=2.0.51
- Affected versionversion=2.0.52
- Affected versionversion=2.0.53
- Affected versionversion=2.0.54
- Affected versionversion=2.0.55
- Affected versionversion=2.0.56
- Affected versionversion=2.0.57
- Affected versionversion=2.0.58
- Affected versionversion=2.0.59
- Affected versionversion=2.0.6
- Affected versionversion=2.0.60
- Affected versionversion=2.0.61
- Affected versionversion=2.0.62
- Affected versionversion=2.0.63
- Affected versionversion=2.0.64
- Affected versionversion=2.0.7
- Affected versionversion=2.0.8
- Affected versionversion=2.0.9
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- NanoClaw loopback webhook approval-bypass verification harnessproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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