Unauthenticated message spoofing via caller-controlled webhook identity
Published Mar 12, 2026 · Updated Mar 12, 2026
Authentication bypass in qhkm ZeptoClaw before 0.7.6 allows remote attackers to submit forged messages through the generic webhook. The validate_auth path accepts requests when auth_token is unset, then checks payload.sender against the allowlist and copies payload.sender and payload.chat_id into InboundMessage without binding either value to an authenticated identity. Reachability requires an enabled, network-accessible webhook without strict upstream authentication; accepted input can impersonate trusted senders and steer messages into attacker-selected chats or downstream agent actions.
Summary
What happened
Authentication bypass in qhkm ZeptoClaw before 0.7.6 allows remote attackers to submit forged messages through the generic webhook. The validate_auth path accepts requests when auth_token is unset, then checks payload.sender against the allowlist and copies payload.sender and payload.chat_id into InboundMessage without binding either value to an authenticated identity. Reachability requires an enabled, network-accessible webhook without strict upstream authentication; accepted input can impersonate trusted senders and steer messages into attacker-selected chats or downstream agent actions.
The record
- CVE
- CVE-2026-32231
- Published
- Mar 12, 2026
- Updated
- Mar 12, 2026
- Vendor
- qhkm
- Product
- ZeptoClaw
- Classifications
- CWE-345, CWE-306, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 12, 2026CVE publishedPublication date reported by the CVE source.
- Mar 12, 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=< 0.7.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- GitHub advisory forged-webhook proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo