What Changed
CISA has added CVE-2026-0770, an unauthenticated remote code execution flaw in Langflow, to its Known Exploited Vulnerabilities catalog and given federal civilian agencies until Friday to remediate under BOD 26-04. The bug, reported by Trend Micro, abuses the exec_globals parameter of Langflow’s validate endpoint and can run code as root.
Exploitation is not new. KEVIntel reports activity going back to June 27, with more than 220 exploitation attempts from 64 IP addresses. Observed payloads tried to deliver malware and to harvest AWS credentials and container metadata.
Why This Is An Operations Problem
Langflow is used to build AI agent and workflow pipelines, which means instances often hold API keys, cloud credentials and connections to internal data. Code execution as root on such a host is a direct path to those secrets.
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This is also a recurring pattern. Earlier Langflow flaws CVE-2025-3248, CVE-2026-33017 and CVE-2026-55255 are already in KEV, and CVE-2025-3248 has been used by the JadePuffer ransomware operation. Teams that patched Langflow once should not assume the platform is settled.
What To Verify First
- Inventory Langflow deployments, including developer and proof-of-concept instances that were never formally onboarded.
- Patch or take exposed instances offline, then review logs for requests to
/api/v1/validate/code. - Rotate credentials reachable from the host, especially AWS keys and anything exposed through container metadata.
- Check for unexpected processes or files consistent with malware staging since late June.
What Teams May Be Underestimating
AI tooling frequently runs outside normal change control. If Langflow was stood up by a data or ML team, the security team may not know it exists, and an exploitation window that opened in June may already have been used.
Source Context
This item was rebuilt from the following primary sources and original reporting:
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