CVE-2026-21445 in the critical feed json
Langflow Missing Authentication on Critical API Endpoints
published 2026-01-02 10 mo ago modified 2026-07-13 3 mo ago also EUVD-2026-0034 , GHSA-c5cp-vx83-jhqx , PYSEC-2026-1524 , PYSEC-2026-2571
- cvss
- 9.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 33.3%
- EPSS 33.3% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- pypi langflow-base 0.7.1
- pypi langflow 1.7.1
- langflow langflow 1.7.1
- langflow-ai langflow 1.7.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 10 mo ago
Exploit prediction
33.29% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Langflow - Broken Access Control nuclei detection template
- github.com https://github.com/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqx referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.8 | 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 |
| CNA | 4.0 | 8.8 | 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 |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | langflow-base | <0.7.1 |
0.7.1 |
| pypi | langflow | <1.7.1 |
1.7.1 |
Affected products
- langflow-ai langflow
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
-
github.com
/langflow-ai/langflow/commit/3fed9fe1b5658f2c8656dbd73508e113a96e486a
web, patch
-
github.com
/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqx
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-21445
advisory
-
github.com
/langflow-ai/langflow
package
-
github.com
/langflow-ai/langflow/releases/tag/1.7.1
web
-
pypi.org
/project/langflow
package
-
github.com
/advisories/GHSA-c5cp-vx83-jhqx
advisory
-
pypi.org
/project/langflow-base
package
Sources
- CVE List CVE-2026-21445
- GitHub Advisory GHSA-c5cp-vx83-jhqx
- NVD CVE-2026-21445
- OSV PYSEC-2026-1524
- OSV PYSEC-2026-2571
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.