Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M

CVE-2026-33053Langflow has Missing Ownership Verification in API Key Deletion (IDOR)

Medium 6.1

In plain English

A medium-severity authorization bypass via user-controlled key in langflow from langflow-ai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.1Medium

Exploit odds (30 days)0.4%top 64.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the delete_api_key_route() endpoint accepts an api_key_id path parameter and deletes it with only a generic authentication check (get_current_active_user dependency). However, the delete_api_key() CRUD function does NOT verify that the API key belongs to the current user before deletion.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	langflow	1.9.0	GHSA-rf6x-r45m-xv3w
PyPI	langflow	1.9.0	PYSEC-2026-78

Affected products (as reported)

Vendor	Product	Versions
langflow-ai	langflow	< 1.9.0

Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:L

References

https://github.com/langflow-ai/langflow/security/advisories/GHSA-rf6x-r45m-xv3w x_refsource_CONFIRM