CVE-2026-112265: fallo de gravedad alta en langbot-app LangBot
LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
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
Productos afectados
langbot-app · LangBotCVEs relacionadas — langbot-app LangBot
En el mismo producto, de las más peligrosas a las 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%
Referencias
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