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CVE-2026-7524 IBM CVE debrief

A critical vulnerability in IBM Langflow OSS versions 1.0.0 through 1.9.1 allows remote code execution through improper validation of symbolic links during archive extraction. The vulnerability, published on 2026-05-27, stems from a path traversal weakness (CWE-22) where symbolic links in archives are not properly validated, potentially allowing attackers to write files to arbitrary locations on the filesystem. This could lead to complete system compromise with network-accessible attack vectors requiring no authentication. The CVSS 3.1 score of 9.8 reflects the severe impact across confidentiality, integrity, and availability with low attack complexity. IBM has published security guidance through their PSIRT channel. Organizations should prioritize patching given the critical severity and remote exploitability.

Vendor
IBM
Product
Langflow OSS
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-27
Original CVE updated
2026-06-02
Advisory published
2026-05-27
Advisory updated
2026-06-02

Who should care

Organizations running IBM Langflow OSS versions 1.0.0 through 1.9.1 in production environments, particularly those exposing Langflow interfaces to untrusted networks or allowing archive uploads from external users. Security teams responsible for ML/AI pipeline infrastructure and developers building applications on Langflow platforms.

Technical summary

The vulnerability exists in the archive extraction functionality of IBM Langflow OSS. When processing archives containing symbolic links, the application fails to validate that extracted files remain within intended directories. This path traversal weakness (CWE-22) allows attackers to craft malicious archives with symlink entries pointing to sensitive system locations. Upon extraction, files can be written outside the intended sandbox, potentially overwriting executables, configuration files, or planting malicious code in paths that will be executed. The attack requires no authentication and can be conducted remotely, resulting in arbitrary code execution with the privileges of the Langflow service.

Defensive priority

critical

Recommended defensive actions

  • Upgrade IBM Langflow OSS to a patched version beyond 1.9.1 when available
  • Review and restrict archive upload functionality if patching is not immediately feasible
  • Implement input validation for archive extraction operations
  • Monitor for anomalous file system activity in Langflow deployment directories
  • Apply principle of least privilege to Langflow service accounts
  • Review IBM security advisory for vendor-specific mitigation guidance

Evidence notes

Vulnerability description sourced from NVD official record. Vendor attribution to IBM derived from reference domain analysis with low confidence flag for review. CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) identified as primary weakness. CVSS vector confirms network attack vector with no privileges required.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-7524 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-7524

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

  • CVE-2026-7524 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-7524

    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.