What is CVE-2025-3248?
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 record classifies CVE-2025-3248 under weakness classes CWE-306, CWE-94. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 570 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 99.9% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
- CISA KEV
- Listed since 2025-05-05, federal remediation deadline 2025-05-26 — used in known ransomware campaigns
- Threadlinqs priority
- 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
- Published
- 2025-04-07, last modified 2026-10-08
Is CVE-2025-3248 being exploited?
CISA added CVE-2025-3248 to the Known Exploited Vulnerabilities catalog on 2025-05-05, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-05-26 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2025-3248 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2025/CVE-2025-3248.yaml). It currently carries a trending score of 60 in the Threadlinqs vulnerability feed.
- ynsmroztas/CVE-2025-3248-Langflow-RCE (github)
- xuemian168/CVE-2025-3248 (github)
- verylazytech/CVE-2025-3248 (github)
- 0-d3y/langflow-rce-exploit (github)
- PuddinCat/CVE-2025-3248-POC (github)
- dennisec/Mass-CVE-2025-3248 (github)
- EQSTLab/CVE-2025-3248 (github)
- drackyjr/cve-2025-3248-exploit (github)
Affected products and versions
- Langflow: Langflow
Affected software packages:
pip:langflow— patched in 1.3.0pip:langflow-base— patched in 0.3.0
How to fix CVE-2025-3248
The record marks a vendor fix as available for CVE-2025-3248. Fixed versions are recorded for 2 packages: pip:langflow 1.3.0, pip:langflow-base 0.3.0. Patch reference: https://github.com/langflow-ai/langflow/pull/6911. Vendor advisory: https://github.com/langflow-ai/langflow/pull/6911. Because CVE-2025-3248 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-05-26. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2025-3248
14 tracked threats in the Threadlinqs corpus reference CVE-2025-3248, either in the campaign’s CVE list or as an indicator on the campaign record.
- Rapid7 Q3 2026 Threat Landscape: High-Severity Flaws Exploited in 3 Days as The Gentlemen and Qilin Ransomware Dominate — HIGH · 2026-10-21
- Abliterated and Resold AI Models Fueling Cybercrime Underground; ARTEX-Assisted Intrusions at South Korean Banks (Flare Quantitative Analysis) — HIGH · 2026-10-20
- Q3 2026 Record Ransomware Surge: 2,627 Claimed Attacks, Qilin and The Gentlemen Lead, Clop Resurgence via PTC Windchill CVE-2026-12569 — HIGH · 2026-10-09
- AI-accelerated intrusions: Microsoft 2026 Digital Defense Report on phishing, public-facing app exploitation, and AI-enabled attacker tooling (s1ngularity, PromptLock, JADEPUFFER/ENCFORGE) — HIGH · 2026-10-03
- GTIG: AI-Era Vulnerability Discovery and Exploitation Surge — In-the-Wild Exploitation of BeyondTrust CVE-2026-1731, LiteLLM CVE-2026-42271 and Langflow CVE-2026-5027 — CRITICAL · 2026-09-30
- Storm-3168 (JADEPUFFER): Agentic-Driven Destructive Cloud Attacks Against Azure via Compromised Service Principals — CRITICAL · 2026-09-26
- Langflow CVE-2025-3248 Unauthenticated RCE Exploited to Build Custom Gafgyt/BASHLITE DDoS Botnet — CRITICAL · 2026-07-14
- CVE-2025-3248 & CVE-2026-5027: Langflow RCE and Path Traversal Chained for Flodrix Botnet Deployment — CRITICAL · 2026-07-12
- JADEPUFFER: AI Agent Exploits Langflow RCE (CVE-2025-3248) to Automate Database Ransomware/Extortion Attack — CRITICAL · 2026-07-05
- JADEPUFFER Agentic Ransomware: Autonomous LLM Agent Exploits Langflow (CVE-2025-3248) and Nacos (CVE-2021-29441) for End-to-End Database Extortion — CRITICAL · 2026-07-04
- JADEPUFFER: First End-to-End Agentic Ransomware Attack Exploiting Langflow (CVE-2025-3248) and Nacos (CVE-2021-29441) — CRITICAL · 2026-07-02
- JADEPUFFER Agentic Ransomware Exploits Langflow CVE-2025-3248 and Nacos CVE-2021-29441 via Base64-Encoded Python Payloads — CRITICAL · 2026-07-02
- JADEPUFFER: Agentic (LLM-Driven) Ransomware Automating Database Extortion via Langflow RCE (CVE-2025-3248) and Nacos Auth Bypass (CVE-2021-29441) — CRITICAL · 2026-07-01
- CVE-2026-33017: Langflow Unauthenticated RCE via Public Flow Build Endpoint — Active Exploitation Within 20 Hours — CRITICAL · 2026-03-19
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.