CVE-2026-112265: falha de alta gravidade em langbot-app LangBot
LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification
Publicada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 8.3epss 0.2%
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:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Produtos afetados
langbot-app · LangBotCVEs relacionadas — langbot-app LangBot
No mesmo produto, das mais perigosas para as menos.
CVE-2026-90562CRITICALLangBot before 4.10.11 Authentication Bypass via Weak Recovery KeyEPSS 0.7%CVE-2026-54449HIGHLangBot: Authenticated RCE Via MCP ConfigurationEPSS 0.7%CVE-2026-90938HIGHLangBot through 0.4.17 Unauthenticated Plugin Registration via WebSocketEPSS 0.6%CVE-2025-59835HIGHLangBot has a cross-directory file upload vulnerability, which could lead to system takeoverEPSS 0.4%CVE-2026-28509MEDIUMLangBot has a Cross Site Scripting(XSS) VulnerabilityEPSS 0.2%
Referências
https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.pyhttps://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.pyhttps://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.pyhttps://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9https://github.com/langbot-app/LangBot/issues/2627https://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification