CVE-2025-3248 — Langflow
CISA KEVAs of 2025-11-06, CVE-2025-3248 is a CRITICAL-severity vulnerability in Langflow, CVSS v3.1 9.8, EPSS 92.0% (99.7th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-05-05), with a US federal remediation deadline of 2025-05-26. Threadlinqs Intelligence links 7 tracked threat campaigns to CVE-2025-3248, most recently “Langflow CVE-2025-3248 Unauthenticated RCE Exploited to Build Custom Gafgyt/BASHLITE DDoS Botnet”.
Last updated: 2025-11-06
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 524 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)
- 92.0% probability of exploitation in the next 30 days, higher than 99.7% of all scored CVEs
- CISA KEV
- Listed since 2025-05-05, federal remediation deadline 2025-05-26
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2025-04-07, last modified 2025-11-06
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. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
Affected products and versions
- Langflow: Langflow
How to fix CVE-2025-3248
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
7 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.
- 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
Sources
Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.
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