CVE-2025-3248
Langflow: Missing Authentication
As of , CVE-2025-3248 in Langflow is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 5 May 2025
- US federal deadline
- 26 May 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- KnownCISA changed it from Unknown to Known on 7 July 2026.
- EPSS score
- 0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- Public exploit
- 1 Metasploit module and 2 Exploit-DB entries
- Fix
- Vendor advice: github.comLinks below, from CISA's entry.
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA's required action
- github.comThis vulnerability affects a common open-source project, third-party library, or a protocol used by different products. For more…
What the flaw is
Langflow contains a missing authentication vulnerability in the /api/v1/validate/code endpoint that allows a remote, unauthenticated attacker to execute arbitrary code via crafted HTTP requests.
CISA's description
Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.
The CVE record's description, from VulnCheck
- CVE published
- 7 April 2025
- Assigned by
- VulnCheck
- CVSS
- 9.8 Critical (CVSS 3.1, from the CNA)
- CWE-306
- Missing Authentication for Critical Function
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- Exploit-DB published an exploit (EDB-ID 52262).
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
- Exploit-DB published an exploit (EDB-ID 52364).
- CISA changed its entry. Ransomware use: Unknown to Known.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: Langflow AI RCEexploit module, rank excellent
- Exploit-DB: Langflow 1.2.x - Remote Code Execution (RCE)EDB-ID 52364, 16 July 2025
- Exploit-DB: Langflow 1.3.0 - Remote Code Execution (RCE)EDB-ID 52262, 18 April 2025
Langflow: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2026-0770Inclusion of Functionality from Untrusted Control Sphere | Langflow Langflow | Patch nowForensic triage required by CISA; Metasploit module | 0.63 | ||
| CVE-2026-55255Authorization Bypass Through User-Controlled Key | Langflow Langflow | Patch nowForensic triage required by CISA | 0.01 | ||
| CVE-2026-33017Code Injection | Langflow Langflow | Patch this weekMetasploit module | 0.25 | ||
| CVE-2025-34291Origin Validation Error | Langflow Langflow | Patch this weekEPSS 0.93 | 0.93 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org