Description
LangBot through 4.11.0 contains a missing authenticity verification vulnerability that allows unauthenticated attackers to inject forged Lark/Feishu events by skipping signature checks. Attackers knowing a bot UUID can POST fabricated im.message.receive_v1 or card.action.trigger events to drive the LLM pipeline, tools, and approvals as other users.
Published: 2026-10-19
Score: 8.3 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 19 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 19 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description LangBot through 4.11.0 contains a missing authenticity verification vulnerability that allows unauthenticated attackers to inject forged Lark/Feishu events by skipping signature checks. Attackers knowing a bot UUID can POST fabricated im.message.receive_v1 or card.action.trigger events to drive the LLM pipeline, tools, and approvals as other users.
Title LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification
First Time appeared Langbot
Langbot langbot
Weaknesses CWE-345
CPEs cpe:2.3:a:langbot:langbot:*:*:*:*:*:*:*:*
Vendors & Products Langbot
Langbot langbot
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Langbot Langbot
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T16:35:03.804Z

Reserved: 2026-10-19T13:25:24.098Z

Link: CVE-2026-112265

cve-icon Vulnrichment

Updated: 2026-10-19T15:35:57.139Z

cve-icon NVD

Status : Deferred

Published: 2026-10-19T14:17:03.277

Modified: 2026-10-19T17:17:14.843

Link: CVE-2026-112265

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T16:00:15Z

Weaknesses
  • CWE-345

    Insufficient Verification of Data Authenticity