CVE-2026-85667CWE-306

CVE-2026-85667

Critical · published September 4, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
52.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00695 · 52.4th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-09-04T19:17Z
References (5)
https://github.com/TeamWiseFlow/xiaobei · [email protected]https://github.com/TeamWiseFlow/xiaobei/blob/v5.5.2/awada/awada-server/src/routes/webhook-worktool.ts · [email protected]https://github.com/TeamWiseFlow/xiaobei/issues/440 · [email protected]https://www.vulncheck.com/advisories/xiaobei-through-5.5.2-unauthenticated-webhook-message-injection · [email protected]https://github.com/TeamWiseFlow/xiaobei/issues/440 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 14:32Z
    xiaobei through 5.5.2 Unauthenticated Webhook Message Injection
    cvelistv5