CVE-2026-112265 LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification
Unauthenticated attackers can forge Lark/Feishu webhook events to impersonate users and trigger unauthorized actions in the LangBot LLM pipeline.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-112265?
CVE-2026-112265 is a high-severity missing authorization vulnerability in langbot-app LangBot, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-345
Which versions are affected by CVE-2026-112265?
How do I fix CVE-2026-112265?
No fix has been published for CVE-2026-112265 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-112265 being exploited?
There is no known exploitation of CVE-2026-112265 in the wild and no public exploit code.
Sources
Also known as GHSA-73v9-9646-vcm5.