SB2026052126 - Multiple vulnerabilities in Langflow
Published: May 21, 2026 Updated: June 19, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Path traversal (CVE-ID: CVE-2026-7524)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.
2) Code Injection (CVE-ID: CVE-2026-48519)
CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')
CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper control of code generation in the Shareable Playground public flow execution endpoint when processing a crafted JSON payload for the data.nodes[X].data.node.template.code.value field. A remote attacker can send a specially crafted request to execute arbitrary code.
User interaction is required to access and run the shared public flow link.
3) UNIX symbolic link following (CVE-ID: CVE-2026-55447)
CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following
CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information and execute arbitrary code.
The vulnerability exists due to UNIX symbolic link following in BaseFileComponent._unpack_bundle in BaseFileComponent-based nodes when processing a user-supplied tar archive. A remote attacker can upload a crafted tar archive containing symlinks to disclose sensitive information and execute arbitrary code.
User interaction is required to ingest the crafted file, and code execution requires a subsequent authentication bypass chain using a disclosed JWT signing secret.
Remediation
Install update from vendor's website.