CVE-2025-3248

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-05-05), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Exploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 100%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
100.0%
KEV
⚠ Exploited

Published

April 7, 2025

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 16, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: github_pr, github_release, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248
generic

Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code | Advisories | VulnCheck

https://www.vulncheck.com/advisories/langflow-unauthenticated-rce
generic

Unsafe at Any Speed: Abusing Python Exec for Unauth RCE | Horizon3.ai

https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
github_release Patch Available

1.3.0

Patch available: langflow-ai/langflow 1.3.0

https://github.com/langflow-ai/langflow/releases/tag/1.3.0
github_pr

fix: auth current user on code validation

Fix merged in langflow-ai/langflow PR #6911 on 2025-03-05 — awaiting tagged release

https://github.com/langflow-ai/langflow/pull/6911

Affected Packages

(2 across 1 ecosystem)
PyPI(2)
PackageVulnerable rangeFixed inDependents
langflow0.0.31 ... 1.2.0 (253 versions)1.3.0—
langflow-base0.0.13 ... 0.2.0 (93 versions)0.3.0—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 19:40 UTCCISA KEV update
  2. 2026-07-21 14:37 UTCCISA KEV update
  3. 2026-07-17 09:09 UTCEG score recompute
  4. 2026-07-16 17:04 UTCCISA KEV update
  5. 2026-07-15 16:49 UTCCISA KEV update
  6. 2026-07-15 15:04 UTCCISA KEV update
  7. 2026-07-14 18:05 UTCCISA KEV update
  8. 2026-07-13 17:07 UTCCISA KEV update
  9. 2026-07-10 17:52 UTCCISA KEV update
  10. 2026-07-09 19:09 UTCEPSS rescore
  11. 2026-07-09 19:09 UTCEPSS rescore
  12. 2026-07-07 19:01 UTCCISA KEV update
  13. 2026-07-07 17:16 UTCCISA KEV update
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-01 19:16 UTCCISA KEV update
  16. 2026-06-29 19:12 UTCCISA KEV update
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 14:07 UTCEPSS rescore
  19. 2026-06-25 19:15 UTCCISA KEV update
  20. 2026-06-23 21:32 UTCEPSS rescore
  21. 2026-06-23 21:32 UTCEPSS rescore
  22. 2026-06-23 17:44 UTCCISA KEV update
  23. 2026-06-18 16:13 UTCCISA KEV update
  24. 2026-06-16 19:33 UTCCISA KEV update
  25. 2026-06-15 19:33 UTCCISA KEV update
Show 24 more
  1. 2026-06-13 23:00 UTCEPSS rescore
  2. 2026-06-12 23:11 UTCEPSS rescore
  3. 2026-06-12 17:35 UTCCISA KEV update
  4. 2026-06-11 19:10 UTCCISA KEV update
  5. 2026-06-10 13:22 UTCEPSS rescore
  6. 2026-06-09 18:42 UTCCISA KEV update
  7. 2026-06-09 17:12 UTCCISA KEV update
  8. 2026-06-08 19:16 UTCCISA KEV update
  9. 2026-06-08 17:26 UTCCISA KEV update
  10. 2026-06-08 14:16 UTCEPSS rescore
  11. 2026-06-08 14:16 UTCEPSS rescore
  12. 2026-06-07 15:24 UTCEPSS rescore
  13. 2026-06-05 22:46 UTCEPSS rescore
  14. 2026-06-05 22:46 UTCEPSS rescore
  15. 2026-06-05 22:43 UTCCISA KEV update
  16. 2026-06-03 19:09 UTCCISA KEV update
  17. 2026-06-02 18:32 UTCCISA KEV update
  18. 2026-06-01 20:42 UTCCISA KEV update
  19. 2026-05-31 22:30 UTCEPSS rescore
  20. 2026-05-31 22:30 UTCEPSS rescore
  21. 2026-05-31 00:16 UTCEPSS rescore
  22. 2026-05-29 22:24 UTCEG score recompute
  23. 2026-05-29 22:20 UTCCISA KEV update
  24. 2026-05-29 13:44 UTCEPSS rescore

Publicly available exploits

(10 references)

Working exploit code is in the public domain (8 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCdrackyjr/cve-2025-3248-exploit
    First seen Nov 20, 2025

    A comprehensive Python exploitation framework for testing and demonstrating CVE-2025-3248, a critical unauthenticated remote code execution vulnerability in Langflow versions ≤ 1.3.0.

    Open source ↗
  • GitHub PoCEQSTLab/CVE-2025-3248
    First seen Sep 15, 2025

    Langflow Remote Code Execution

    Open source ↗
  • Exploit-DBEDB-52364
    First seen Jul 16, 2025

    Langflow 1.2.x - Remote Code Execution (RCE)

    Open source ↗
  • GitHub PoCdennisec/Mass-CVE-2025-3248
    First seen Jun 23, 2025

    Mass-CVE-2025-3248

    Open source ↗
  • GitHub PoC0-d3y/langflow-rce-exploit
    First seen Jun 23, 2025

    Remote Code Execution Exploit for Langflow (CVE-2025-3248) - [ By S4Tech ]

    Open source ↗
  • GitHub PoCynsmroztas/CVE-2025-3248-Langflow-RCE
    First seen Jun 17, 2025

    CVE-2025-3248 Langflow RCE Exploit

    Open source ↗
  • GitHub PoCvigilante-1337/CVE-2025-3248
    First seen May 13, 2025

    CVE-2025-3248: A critical flaw has been discovered in Langflow that allows malicious actors to execute arbitrary Python code on the target system. This can lead to full remote code execution without authentication, potentially giving attackers control over the server.

    Open source ↗
  • Exploit-DBEDB-52262
    First seen Apr 18, 2025

    Langflow 1.3.0 - Remote Code Execution (RCE)

    Open source ↗
  • GitHub PoCverylazytech/CVE-2025-3248
    First seen Apr 16, 2025
    Open source ↗
  • GitHub PoCxuemian168/CVE-2025-3248
    First seen Apr 10, 2025

    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。

    Open source ↗

Frequently asked(6)

What is CVE-2025-3248?
CVE-2025-3248 is a critical vulnerability published on April 7, 2025. 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.
When was CVE-2025-3248 disclosed?
CVE-2025-3248 was first published in the National Vulnerability Database on April 7, 2025, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-3248 actively exploited?
Yes. CISA added CVE-2025-3248 to the Known Exploited Vulnerabilities catalog on May 5, 2025, affecting Langflow Langflow. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2025-3248?
CVE-2025-3248 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2025-3248?
CVE-2025-3248 affects Langflow Langflow. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2025-3248?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-3248, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-3248

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