CVE-2025-3248Vulnerability

1. “Sensors also caught attempts against an older Langflow code injection flaw, CVE-2025-3248.”

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2. “…ion flaw in LiteLLM (CVE-2026-42271) that leads to host takeover and API credential theft, and two Langflow flaws (CVE-2026-5027 and CVE-2025-3248) that let attackers write files to the host or run code remotely.”

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3. “CVE-2025-3248 (Langflow): Unauthenticated Python code injection via exec() in /api/v1/validate/code, permitting immediate RCE.”

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4. “The agentic attack exploited a known security flaw in Langflow (CVE-2025-3248) to break in, harvested credentials, burrowed deeper into the network, encrypted Nacos service configuration files, dropped the original database tables, and left a ransom note demanding a Bitcoin payme…”

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5. “Insikt Group previously created a Nuclei template to detect the Langflow vulnerability (CVE-2025-3248) featured in this report.”

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6. “That flaw, CVE-2025-3248, carries a Common Vulnerability Scoring System (CVSS) score of 9.8, was fixed in Langflow 1.3.0, and was added to CISA’s Known Exploited Vulnerabilities catalog in May 2025.”

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7. “Entry was again through CVE-2025-3248, a missing-authentication flaw in Langflow's code validation endpoint that CISA added to its Known Exploited Vulnerabilities catalog in May 2025.”

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8. “The first, CVE-2025-3248, was exploited in June 2025 by the Flodrix distributed denial-of-service (DDoS) botnet operators using essentially the same primitive.”

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Also named with it: CVE-2026-1731, CVE-2026-60137, CVE-2026-63030, CVE-2021-29441, CVE-2026-42271, CVE-2026-5027, CVE-2025-49113, CVE-2026-33824, CVE-2024-42009, CVE-2026-15409, CVE-2026-15410, CVE-2026-25089, CVE-2026-39808, CVE-2026-42897, CVE-2025-55182, CVE-2026-33017, CVE-2019-12255, CVE-2019-12260, CVE-2019-12261, CVE-2019-12263