{"schema":"threatline.record/2","record":{"id":"CVE-2026-112265","aliases":[],"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.","categories":["Unclassified"],"product":"LangBot","vendor":"langbot-app","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-112265","source_modified_at":"2026-10-19T16:35:03.804Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"LangBot","vendor":"langbot-app","versions":[{"version":"0","lessThanOrEqual":"4.11.0","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.3,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00154,"percentile":0.0418,"score_date":"2026-10-23"},"published_at":"2026-10-19T13:55:15.112Z","modified_at":"2026-10-19T16:35:03.804Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-112265","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T16:35:03.804Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-112265","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/langbot-app/LangBot/issues/2627","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9","tags":["patch"]},{"source":"CVE List","url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py","tags":["technical-description"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-19T15:35:56.090702Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-19T16:35:03.804Z","content_hash":"79c7ffc2e2e49ebe0463a81df1dacac015833b0eb31b7254bcd8e538344ae3f3"}}