CVE-2025-3248Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
- 9.8CriticalCVSS base score
- 100.0%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 5 May 2025
- 4Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Langflow Missing Authentication Vulnerability.
- Added
- 5 May 2025
- Fix due (US federal)
- 26 May 2025
- Used by ransomware
- Known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 5 May 2025.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module, a Nuclei template and 2 Exploit-DB entries for it. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits5
Metasploit modules1 module
- Langflow AI RCE (Metasploit module) (opens in a new tab)
exploit/multi/http/langflow_unauth_rce_cve_2025_3248Rank excellentdisclosed 9 Apr 2025
Nuclei templates1 template
- Langflow AI - Unauthenticated Remote Code Execution (Nuclei template) (opens in a new tab)
http/cves/2025/CVE-2025-3248.yamlSeverity critical
Exploit-DB2 entries
- Langflow 1.2.x - Remote Code Execution (RCE) (Exploit-DB entry) (opens in a new tab)
EDB-ID 52364webapps, multiplepublished 16 Jul 2025Not verified
- Langflow 1.3.0 - Remote Code Execution (RCE) (Exploit-DB entry) (opens in a new tab)
EDB-ID 52262remote, multiplepublished 18 Apr 2025Not verified
References tagged exploit1 reference
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By VulnCheck
- 3 days later
· 3 days later
Published
- 28 days later
· 28 days later
Added to CISA KEV
Known exploited, also by ransomware
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulnCheckCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 100.0% · top 0.1% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected < 1.3.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIlangflowGHSA-rvqx-wpfh-mfx7 (opens in a new tab)
- PyPIlangflow-baseGHSA-rvqx-wpfh-mfx7 (opens in a new tab)
References
References5
- https://github.com/langflow-ai/langflow/pull/6911 (opens in a new tab)issue-trackingpatch
- langflow 1.3.0 Release Notes (opens in a new tab)release-notes
- https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/ (opens in a new tab)exploit
- https://www.vulncheck.com/advisories/langflow-unauthenticated-rce (opens in a new tab)third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-10011 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-rvqx-wpfh-mfx7 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-3248)Record last updated .