{"id":"CVE-2026-112265","published":"2026-10-19T14:17:03.277","lastModified":"2026-10-19T17:17:14.843","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.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","cwes":["CWE-345"],"vendors":[],"products":[],"references":[{"url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py","tags":[]},{"url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py","tags":[]},{"url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py","tags":[]},{"url":"https://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9","tags":[]},{"url":"https://github.com/langbot-app/LangBot/issues/2627","tags":[]},{"url":"https://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification","tags":[]}],"exploitRefs":[{"url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py","tags":[]},{"url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py","tags":[]},{"url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py","tags":[]},{"url":"https://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9","tags":[]},{"url":"https://github.com/langbot-app/LangBot/issues/2627","tags":[]}],"hasPoc":true,"ai":null}