{"id":"CVE-2026-112265","summary":"LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification","details":"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.","modified":"2026-10-24T02:48:20.679412703Z","published":"2026-10-19T13:55:15.112Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-345"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112265.json"},"references":[{"type":"WEB","url":"https://pypi.org"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112265.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112265"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification"},{"type":"REPORT","url":"https://github.com/langbot-app/LangBot/issues/2627"},{"type":"FIX","url":"https://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9"},{"type":"PACKAGE","url":"https://github.com/langbot-app/LangBot"},{"type":"ARTICLE","url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py"},{"type":"ARTICLE","url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py"},{"type":"ARTICLE","url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/langbot-app/langbot","events":[{"introduced":"0"},{"fixed":"43c481d74a6388657b84baa7d292c613c75c24f9"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"last_affected":"4.11.0"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"43c481d74a6388657b84baa7d292c613c75c24f9"}]}]}}],"versions":["v4.11.0","v4.11.0-rc.3","v4.11.0-rc.2","v4.11.0-rc.1","v4.11.0-beta.6","v4.10.11","v4.10.10","v4.10.9","v4.10.8","v4.10.7","v4.10.6","v4.10.5","v4.10.4","v4.10.3","v4.10.2","v4.10.1","v4.10.0","v4.10.0-beta.3","v4.10.0-beta.2","v4.9.7","v4.9.6","v4.9.5","v4.9.4","v4.9.3","v4.9.2","v4.9.1","v4.9.0","v4.8.7","v4.8.6","v4.8.5","v4.8.4","v4.8.3","v4.8.2","v4.8.1","v4.8.0","v4.7.2","v4.7.1","v4.7.0","v4.6.5","v4.6.4","v4.6.3","v4.6.2","v4.6.1","v4.6.0","v4.5.4","v4.5.3","v4.5.1b3","v4.5.1b2","v4.5.1b1","v4.5.0","v4.4.2b1","v.4.4.2b1","v4.4.1","v4.4.0","v4.3.9","v4.3.8","v4.3.7","v4.3.7b1","v4.3.6","v4.3.5","v4.3.4","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v4.2.2","v4.3.0.beta2","v4.2.1","v4.2.0","v4.1.2","v4.1.1","v4.1.0","v4.0.9","v4.0.8.1","v4.0.8","v4.0.7","v4.0.6","v4.0.5","v4.0.4","v4.0.3.3","v4.0.3.2","v4.0.3.1","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v4.0.0-beta.2","v4.0.0-beta.1","v3.4.14.3","v3.4.14.2","v3.4.14.1","v3.4.14","v3.4.13.1","v3.4.13","v3.4.12.1","v3.4.12","v3.4.11.2","v3.4.11.1","v3.4.11","v3.4.10.4","v3.4.10.3","v3.4.10.2","v3.4.10.1","v3.4.10","v3.4.9.5","v3.4.9.4","v3.4.9.3","v3.4.9.2","v3.4.9.1","v3.4.9","v3.4.8","v3.4.7.2","v3.4.7.1","v3.4.7","v3.4.6.2","v3.4.6.1","v3.4.6","v3.4.5.2","v3.4.5.1","v3.4.5","v3.4.4.1","v3.4.4","v3.4.3.2","v3.4.3.1","v3.4.3","v3.4.2.1","v3.4.2","v3.4.1.6-pre","v3.4.1.5","v3.4.1.4","v3.4.1.3","v3.4.1.2","v3.4.1.1","v3.4.1","v3.4.0.2","v3.4.0.1","v3.4.0","v3.3.1.1","v3.3.1.0","v3.3.0.2","v3.3.0.1","v3.3.0","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2.0.1","v3.2.0","v3.1.1","v3.1.0.4","v3.1.0.3","v3.1.0.2","v3.1.0.1","v3.1.0","v3.0.2","v3.0.1.3","v3.0.1","v3.0.0","v2.6.10","v2.6.9","v2.6.8","v2.6.7","v2.6.6","v2.6.5","v2.6.4","v2.6.3","v2.6.2","v2.6.1","v2.6.0","v2.5.2","v2.5.1","v2.5.0","v2.4.7","v2.4.6","v2.4.5","v2.4.3.1","v2.4.3","v2.4.2","v2.4.1","v2.4.0","v2.3.9","v2.3.8","v2.3.7","v2.3.6","v2.3.5","v2.3.4","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.5","v2.1.4","v2.2.4","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.0","v1.2.0","v1.1.0","v1.0.0","v0.1.0","noReleaseProvided"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112265.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}