CVE-2026-21445 is a critical authentication bypass vulnerability affecting Langflow versions prior to 1.7.0.dev45. Unauthenticated attackers can access sensitive user conversation data, transaction histories, and perform destructive operations like message deletion due to missing authentication controls on multiple API endpoints. With a CVSS score of 9.1 (CRITICAL), this network-exploitable flaw requires no user interaction and can lead to high confidentiality, integrity, and availability impacts. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion, but a patch is available in version 1.7.0.dev45.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.7.1CPE matchmatch criteria | cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.