CVE-2025-3248
Confirmed PUBLISHEDLangflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Apr 07, 2025
- Exploitation Reported
- May 05, 2025
- CVSS
- 9.8 Critical
- EPSS
- 100.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| langflow-ai |
langflow
|
0 to < 1.3.0 |
Affected |
CVE References
- Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://www.vulncheck.com/advisories/langflow-unauthenticated-rce
- Exploit — horizon3.ai horizon3.ai · Exploit https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-spe...
- GitHub — langflow-ai/langflow github.com · Issue Tracking https://github.com/langflow-ai/langflow/pull/6911
- GitHub — langflow-ai/langflow github.com · Release Notes https://github.com/langflow-ai/langflow/releases/tag/1.3.0
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2025-05-05 00:00 UTC |
| The Shadowserver | 2026-06-01 00:00 UTC |
| Daily CyberSecurity | 2026-06-05 09:20 UTC |
| CVE | 2026-06-23 16:40 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-3248.yaml | Apr 25, 2025 |
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/langflow_unauth_rce_cve_2025_3248.rb | Apr 28, 2025 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2025-05-05 00:00:00 UTC · CISA
Proof of concept available
Recorded 2025-04-27 04:41:18 UTC · GitHub
Weaknesses (CWE)
-
Missing Authentication for Critical Function
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/langflow_unauth_rce_cve_2025_3248.rb | Apr 28, 2025 |
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-3248.yaml | Apr 25, 2025 |
Recent Mentions
Daily CyberSecurity · Jun 05, 2026
A critical Teamwork Cloud RCE vulnerability exposes corporate modeling architectures to full remote takeover. The software bug carries The post Teamwork Cloud RCE Vulnerability Threatens Corporate Modeling Platforms appeared first on Daily CyberSecurity. Related posts: CVE-2025-5086 (CVSS 9.0): A Critical RCE in DELMIA Apriso with Exploit Attempts Seen in the Wild Langflow Under Attacks: CVE-2025-3248 Exploited to Deliver Stealthy Flodrix Botnet RenderShock: New Zero-Click Attack Explores Hidden Vulnerabilities in OS & Enterprise Environments
TheHackerNews · May 06, 2025
A recently disclosed critical security flaw impacting the open-source Langflow platform has been added to the Known Exploited Vulnerabilities (KEV) catalog by the U.S. Cybersecurity and Infrastructure Security Agency (CISA), citing evidence of active exploitation. The vulnerability, tracked as CVE-2025-3248, carries a CVSS score of 9.8 out of a maximum of 10.0. "Langflow contains a missing
All CISA Advisories · May 05, 2025
CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2025-3248 Langflow Missing Authentication Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the Known Exploited Vulnerabilities Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information. Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2025-04-27 04:41:18 UTC · 0 stars
CVE-2025-3248 Langflow 사전 인증 원격 코드 실행 취약점 PoC
github · Created 2025-04-16 14:00:02 UTC · 3 stars
github · Created 2025-04-10 14:04:29 UTC · 1 stars
POC of CVE-2025-3248, RCE of LangFlow
github · Created 2025-04-10 11:45:57 UTC · 5 stars
A vulnerability scanner for CVE-2025-3248 in Langflow applications. 用于扫描 Langflow 应用中 CVE-2025-3248 漏洞的工具。
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
16:40 UTC 29 days ago16:40 UTC · 29 days ago
KEV confirmed by CVE
Exploitation attested by an external source
-
09:20 UTC about 2 months ago09:20 UTC · about 2 months ago
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
00:00 UTC about 2 months ago00:00 UTC · about 2 months ago
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
00:00 UTC about 1 year ago00:00 UTC · about 1 year ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
15:02 UTC about 1 year ago15:02 UTC · about 1 year ago
Metasploit module available
Exploit module available
-
00:00 UTC about 1 year ago00:00 UTC · about 1 year ago
Nuclei template available
Scanner coverage available
-
11:45 UTC over 1 year ago11:45 UTC · over 1 year ago
Public PoC available
Public proof-of-concept code published
-
14:22 UTC over 1 year ago14:22 UTC · over 1 year ago
CVE published
Vulnerability disclosed publicly
-
00:58 UTC over 1 year ago00:58 UTC · over 1 year ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2025-3248
{
"cve_id": "CVE-2025-3248",
"title": "Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code",
"affected_vendor": "langflow-ai",
"affected_product": "langflow",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": 0.9999,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}