CVE-2025-3248
CriticalExploitedPublic exploitLangflow Unauth RCE
Published Jun 17, 2025 · Updated Oct 10, 2026 · Also known as GHSA-rvqx-wpfh-mfx7, PYSEC-2025-36, PYSEC-2026-380
Key Facts
Patch immediately- CVE-2025-3248 is a critical-severity vulnerability (CVSS 9.3 v4) affecting Langflow, langflow-base (pypi).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 12, 2025 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Langflow 1.3.0, langflow-base 0.3.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-3248 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 5, 2025 | May 26, 2025 | Known |
| Industry KEV feed | Apr 12, 2025 | May 26, 2025 | Known |
| CIRCL KEV | May 5, 2025 | May 26, 2025 | Not reported |
| ENISA EUVD | May 5, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| LangflowLangflow | See advisory | 1.3.0 |
| langflow-basepypi | See advisory | 0.3.0 |
Patched Releases
Langflow
1.3.0
langflow-base
0.3.0
Timeline
Added to Industry KEV feed
Apr 12, 2025
Added to CISA KEV
May 5, 2025
Added to CIRCL KEV
May 5, 2025
Added to ENISA EUVD
May 5, 2025
Publicly disclosed
Jun 17, 2025
Last updated
Oct 10, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
- CWE-306 Missing Authentication for Critical Function
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3248.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-3248
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint.
Affected: Langflow; langflow-base (pypi). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 12, 2025 and is known to be used in ransomware campaigns.
Yes. It was added on May 5, 2025 with a federal remediation due date of May 26, 2025.
Public exploit code is available.
Fixed versions are available, including Langflow 1.3.0, langflow-base 0.3.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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