CVE-2026-85667Network attack vector

Unauthenticated agent message injection via unsigned webhook requests

Published Sep 4, 2026 · Updated Sep 8, 2026

Missing authentication in TeamWiseFlow xiaobei 5.5.2 and earlier allows remote attackers to inject messages through a webhook. The /webhook_worktool route accepts request bodies without authenticating the sender or validating a signature, forwards message content into the agent pipeline, and fetches supplied media URLs without validating their destinations. No account or user interaction is required; a reachable endpoint exposes agent-pipeline integrity and permits server-side requests to internal services.

CVSS severity9.3
Critical
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in TeamWiseFlow xiaobei 5.5.2 and earlier allows remote attackers to inject messages through a webhook. The /webhook_worktool route accepts request bodies without authenticating the sender or validating a signature, forwards message content into the agent pipeline, and fetches supplied media URLs without validating their destinations. No account or user interaction is required; a reachable endpoint exposes agent-pipeline integrity and permits server-side requests to internal services.

The record

CVE
CVE-2026-85667
Published
Sep 4, 2026
Updated
Sep 8, 2026
Vendor
TeamWiseFlow
Product
xiaobei
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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.

  1. Affected versionversion=0 <=5.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TeamWiseFlow · xiaobeiversion=0 <=5.5.2

Published CVSS scores

9.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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