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PatchSiren cyber security CVE debrief

CVE-2026-81940 IBM CVE debrief

IBM Langflow OSS versions 1.0.0 through 1.11.5 are vulnerable to remote authenticated attackers executing arbitrary code due to improper neutralization of special characters in flow display names. This could lead to significant impact, especially in sensitive environments. Defenders should assess exposure and prioritize remediation, verifying affected versions and scope. The CVE record and NVD entry provide limited information, so further verification is needed to determine the full scope of affected versions and potential impact.

Vendor
IBM
Product
Langflow OSS
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-10
Original CVE updated
2026-09-11
Advisory published
2026-09-10
Advisory updated
2026-09-11

Who should care

Defenders responsible for IBM Langflow OSS deployments, especially those with remote authenticated access, should assess exposure and prioritize remediation.

Why it matters

Defenders should care about CVE-2026-81940 because it allows remote authenticated attackers to execute arbitrary code in IBM Langflow OSS deployments, potentially leading to significant impact. Verification and remediation are crucial, especially in sensitive environments.

  • Potential remote code execution by authenticated attackers
  • Need for verification of affected versions and scope
  • Remediation priority for environments with sensitive data or systems

Technical summary

The vulnerability exists in IBM Langflow OSS versions 1.0.0 through 1.11.5 due to improper neutralization of special characters in flow display names, allowing remote authenticated attackers to execute arbitrary code. This highlights the need for defenders to verify and remediate this vulnerability, especially in environments with remote authenticated access, by reviewing and remediating flow display names for special characters and restricting remote authenticated access to sensitive environments.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in IBM Langflow OSS deployments, especially in environments with remote authenticated access.

Recommended defensive actions

  • Verify IBM Langflow OSS version and check for updates
  • Review and remediate flow display names for special characters
  • Restrict remote authenticated access to sensitive environments

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with the primary source being the IBM support page. Further verification is needed to determine the full scope of affected versions and potential impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-81940 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-81940

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

  • CVE-2026-81940 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-81940

    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.