CVE-2026-112265: Insufficient Verification of Data Authenticity in langbot-app LangBot
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.
CVSS v4.0
Score 8.3high
Affected software
langbot-app
LangBot
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-112265 describes a missing authenticity verification vulnerability in LangBot through version 4.11.0. The flaw allows unauthenticated attackers to inject forged Lark/Feishu events by skipping signature verification. Specifically, attackers who know a bot UUID can POST fabricated im.message.receive_v1 or card.action.trigger events. These forged events can drive internal processes such as the language model pipeline, tools, and approval workflows, impersonating other users within the system.
Potential Impact
An attacker can impersonate legitimate users by injecting forged events without authentication, potentially manipulating the language model pipeline and approval processes. This could lead to unauthorized actions being performed within LangBot, impacting the integrity and trustworthiness of automated workflows.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to bot UUIDs and monitor for suspicious POST requests attempting to inject forged events.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-19T13:25:24.098Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad623792cdf04f6565c8804
Added to database: 10/19/2026, 14:04:41 UTC
Last enriched: 10/19/2026, 14:18:29 UTC
Last updated: 10/19/2026, 19:06:47 UTC
Views: 8
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