Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Langflow versions up to and including 1.6.9 are vulnerable. A victim who visits a malicious webpage while logged in can have their session refreshed by that page, letting an attacker obtain access and refresh tokens. The attacker can then reach authenticated features, including built-in code execution, to run arbitrary code on the system. Upgrade to Langflow 1.7.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 9.4 | Critical | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | CNA (VulnCheck) |
- CISA KEV Listed since 21 May 2026: known to be exploited.
- EPSS 0.93, the 99th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.