PatchSiren cyber security CVE debrief

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: 2026-05-27
Advisory published: 2026-05-27
Advisory updated: 2026-05-27

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.

Official resources

2026-05-27