Loading...
Skip to main content
GeekWala

CVE-2026-55255 — Vulnerability in langflow — CVE Details

CRITICAL
Actively Exploited

Published June 23, 2026Updated June 26, 2026Source: osv

What Should I Do?

Patch Immediately

This vulnerability is confirmed under active exploitation (CISA KEV). Patch within 24-48 hours if possible.

Summary

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.2.

Advisory Timeline

  • First published June 23, 2026 (111 days ago).
  • Last revised June 26, 2026 — 2 days after initial publication.
  • Added to CISA's Known Exploited Vulnerabilities catalog 13 days after publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update langflow to 1.9.2 or later
pip install "langflow>=1.9.2"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
langflow
pypi
0.0.31, 0.0.32, 0.0.33, 0.0.40 (+291 more)1.9.2

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.9 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

References

Frequently Asked Questions

What is CVE-2026-55255?
This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.9/10).
How do I check if my project is affected by CVE-2026-55255?
CVE-2026-55255 affects langflow. This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, meaning it is being actively exploited in the wild. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-55255 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.9

Exploitation is straightforward and causes maximum impact. Patch immediately.

Known Exploited Vulnerability

This vulnerability is in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild.

Added to KEV catalog: July 7, 2026

Remediation deadline: July 10, 2026

Also Known As

PYSEC-2026-221
GHSA-qrpv-q767-xqq2

Related CVEs

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies