CVE-2026-85667: Missing Auth (CVSS 9.1)

Description

xiaobei through 5.5.2 fails to implement authentication or signature validation on webhook endpoints, allowing unauthenticated attackers to inject arbitrary messages into the agent pipeline. Attackers can publish malicious messages via the /webhook_worktool handler and exploit unvalidated media URL fetching to perform server-side request forgery against internal services.

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0038

Probability of exploitation

0.32%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-306 Missing Authentication

References

Other References

https://github.com/TeamWiseFlow/xiaobei https://github.com/TeamWiseFlow/xiaobei/blob/v5.5.2/awada/awada-server/src/routes/webhook-worktool.ts https://github.com/TeamWiseFlow/xiaobei/issues/440 https://www.vulncheck.com/advisories/xiaobei-through-5.5.2-unauthenticated-webhook-message-injection https://github.com/TeamWiseFlow/xiaobei/issues/440

Frequently Asked Questions

What is CVE-2026-85667? +

xiaobei through 5.5.2 fails to implement authentication or signature validation on webhook endpoints, allowing unauthenticated attackers to inject arbitrary messages into the agent pipeline. Attackers can publish malicious messages via the /webhook_worktool handler and exploit unvalidated media URL fetching to perform server-side request forgery against internal services. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-85667? +

CVE-2026-85667 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0038, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-85667? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-85667