How severe is CVE-2025-3248?

CVE-2025-3248 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-3248 being actively exploited?

Yes. CVE-2025-3248 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-05-05, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-3248?

CVE-2025-3248 affects Langflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-3248?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-3248 have an EU (EUVD) identifier?

Yes. CVE-2025-3248 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10011. It is also flagged as exploited in the EUVD (since 2025-05-05).

When was CVE-2025-3248 published?

CVE-2025-3248 was published on 2025-04-07 and last updated on 2026-06-17.

CVE-2025-3248

CVE-2025-3248 is a critical-severity vulnerability in Langflow with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-05-05). The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-05-05)
EU (EUVD) id: EUVD-2025-10011
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-05-05)
Weakness: CWE-94
Affected product: Langflow
Published: 2025-04-07
Last modified: 2026-06-17

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.

Frequently asked questions

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.
How severe is CVE-2025-3248?: CVE-2025-3248 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-3248 being actively exploited?: Yes. CVE-2025-3248 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-05-05, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-3248?: CVE-2025-3248 affects Langflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-3248?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-3248 have an EU (EUVD) identifier?: Yes. CVE-2025-3248 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10011. It is also flagged as exploited in the EUVD (since 2025-05-05).
When was CVE-2025-3248 published?: CVE-2025-3248 was published on 2025-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

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