CVE-2026-33309 is a critical Arbitrary File Write vulnerability affecting Langflow versions 1.2.0 through 1.8.1, stemming from an incomplete patch for a previous file name validation bypass. This flaw allows an authenticated attacker to remotely write files to arbitrary locations on the host system with low complexity, ultimately leading to Remote Code Execution (RCE). With a CVSS score of 9.9, the potential impact is severe, compromising confidentiality, integrity, and availability. There is currently no evidence of active exploitation, nor are public exploit codes or significant community discussion available for this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.2.0, < 1.9.0CPE matchmatch criteria | cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.