CVE-2026-13442 IBM CVE debrief

Who should care

Defenders responsible for Langflow OSS installations, particularly those handling sensitive data, should assess exposure and potential impact. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure of Langflow OSS installations and review compensating controls for exposed systems. They should also prioritize updating Langflow OSS versions to 1.10.2 or later to mitigate potential

Why it matters

CVE-2026-13442 allows an attacker to reuse another user's FAISS namespace, causing cross-user information disclosure and limited integrity impact. Defenders should prioritize verifying exposure of Langflow OSS installations and assessing potential impact on sensitive data.

• Cross-user information disclosure
• Limited integrity impact through persistent poisoning of returned results
• Verification of Langflow OSS installations for exposure
• Assessment of potential impact on sensitive data

Technical summary

IBM Langflow OSS versions 1.0.0 through 1.10.1 are vulnerable to cross-user information disclosure and limited integrity impact due to improper namespace handling. This vulnerability allows an attacker to reuse another user's FAISS namespace, accessing owner-only vector content and influencing later query results. The vulnerability emphasizes the need for defenders to prioritize verifying exposure of Langflow OSS installations and assessing potential impact on sensitive data to mitigate cross-user information disclosure and limited integrity impact.

Defensive priority

Defenders should prioritize verifying exposure of Langflow OSS installations and assessing potential impact on sensitive data.

Recommended defensive actions

• Verify Langflow OSS installations for exposure
• Assess potential impact on sensitive data
• Review and update Langflow OSS versions to 1.10.2 or later
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability allows an attacker to reuse another user's FAISS namespace, causing cross-user information disclosure and limited integrity impact. Defenders should verify exposure of Langflow OSS installations and assess potential impact on sensitive data. Evidence from the CVE Program and NVD detail page supports this assessment, highlighting the need for defenders to review and update Langflow OSS to at

Sources and 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.