CVE•Published 2026-01-02•1 article on news•7 live references•NVD data
CVE-2026-21445
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
8.8
HIGH
EPSS percentile
97
Exploit Prediction Scoring System · top 3% of all CVEs
Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. Version 1.7.0.dev45 contains a patch.
Timeline
Published 2026-01-02
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag1,279 hosts
vuln:CVE-2026-21445Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Langflow Langflow"All exposed Langflow Langflow instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Langflow"HTTP body or banner mentions "Langflow" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-21445Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-21445Censys host search filtered to this CVE id.
grep.app
CVE-2026-21445Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-21445GitHub code search for direct mentions.
Google dork
"CVE-2026-21445" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2026-214458 repos
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
DarkFunct/TK-CVE-RepoPython
TK-CVE-Repo
Xuchen-Li/cv-arxiv-dailyPython
Automatically update arXiv papers about SOT & VLT, Multi-modal Learning, LLM and Video Understanding using Github Actions.
XuzhaoLi/ro-arxiv-dailyPython
Automatically Update Arxiv Papers about Path Planning, LLM and Autonomous Driving using Github Actions since 2024.2.
cnlinxi/LLM-paper-dailyPython
Automatically Update LLM Papers Daily using Github Actions. Ref: https://github.com/Vincentqyw/cv-arxiv-daily
rxerium/CISA-KEVPython
An automated repo to track Nuclei template scanning capabilities against the CISA KEV.
chinaxploiter/CVE-2026-21445-PoCPython
Academic proof-of-concept demonstrating CVE-2026-21445 [LangFlow] for authorized security research.
magercode/List-CVE-2025-2026unknown
Daftar CVE 2025-2026 terupdate