{"id":"CVE-2026-112265","revision":"7bd9eb0bfbe84794a032d0cc32de6ada","records":[{"revision":"7bd9eb0bfbe84794a032d0cc32de6ada","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-112265","aliases":[],"title":"LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification","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.","state":0,"publishedAt":"2026-10-19T13:55:15.112+00:00","modifiedAt":"2026-10-19T16:35:03.804+00:00","affected":[{"ecosystem":"https://pypi.org","name":"LangBot","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"langbot-app\",\n                    \"product\": \"LangBot\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"4.11.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:pypi/langbot\",\n                    \"collectionURL\": \"https://pypi.org\",\n                    \"repo\": \"https://github.com/langbot-app/LangBot\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.3,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/langbot-app/LangBot/issues/2627","https://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9","https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py","https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py","https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py","https://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112265","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-112265","identifiers":["CVE-2026-112265"]},"retained":false,"historicalAffected":[]}],"coverage":[]}