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CVE-2026-6543 Langflow CVE debrief

CVE-2026-6543 is a high-severity command execution issue in Langflow Desktop affecting versions 1.0.0 through 1.8.4. An attacker with low privileges can run arbitrary commands as the Langflow process, which may expose environment secrets such as API keys and database credentials, modify files, or support follow-on attacks inside the network. NVD classifies the weakness as CWE-94 and rates it 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Vendor
Langflow
Product
Langflow Desktop
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-30
Original CVE updated
2026-05-11
Advisory published
2026-04-30
Advisory updated
2026-05-11

Who should care

Administrators and operators running Langflow Desktop 1.0.0 through 1.8.4, especially environments that store secrets in process environment variables or allow access to sensitive internal resources.

Technical summary

The NVD record describes an arbitrary command execution condition in Langflow Desktop with the impact of process-level code execution. The published metadata lists affected versions from 1.0.0 through 1.8.4, a CVSS v3.1 score of 8.8, and CWE-94 as the primary weakness. Because the process can execute attacker-controlled commands, the likely consequences include credential exposure, file modification, and internal network access from the affected host.

Defensive priority

High priority. Treat as urgent for any exposed or broadly trusted Langflow Desktop deployment, especially where the process has access to secrets or internal services.

Recommended defensive actions

  • Review the IBM PSIRT advisory linked from the NVD record and apply the vendor's mitigation or upgrade guidance.
  • Confirm whether any Langflow Desktop instances are running versions 1.0.0 through 1.8.4 and prioritize remediation.
  • Run the application with the least-privilege account possible and remove unnecessary access to environment secrets.
  • Isolate affected systems from sensitive internal network segments until remediation is complete.
  • Audit for unexpected command execution, file changes, or access to API keys and database credentials.
  • Rotate exposed credentials if there is any indication the affected process could have been abused.

Evidence notes

Evidence is limited to the supplied official corpus: the NVD record shows CVE-2026-6543 as analyzed, with affected cpe criteria for cpe:2.3:a:langflow:langflow_desktop versions 1.0.0 through 1.8.4, CVSS v3.1 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, and CWE-94. NVD references an IBM PSIRT vendor advisory (https://www.ibm.com/support/pages/node/7271092). No KEV enrichment was supplied.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-6543 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-6543

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-6543 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-6543

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.