ZeusQA
Start free

Known exploited vulnerability

CVE-2025-3248

criticalCVSS 3.1 9.8In CISA KEVRansomwareEPSS 100%Published · langflow-ai

The short answer

CVE-2025-3248 affects langflow-ai langflow and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-05-05: attackers are using it, so patch it first. Fixed versions are published for langflow (1.3.0) and langflow-base (0.3.0).

What it is

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.

Weakness: CWE-306, CWE-94.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since May 5, 2025

Federal due date May 26, 2025

EPSS, next 30 days

100%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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 packages and fixed versions

PackageEcosystemFixed inAdvisory
langflowPyPI1.3.0GHSA-rvqx-wpfh-mfx7
langflow-basePyPI0.3.0GHSA-rvqx-wpfh-mfx7

Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.

Affected products

langflow. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2025-3248 being exploited?

Yes. CISA added CVE-2025-3248 to its Known Exploited Vulnerabilities catalog on 2025-05-05, with a federal remediation due date of 2025-05-26. CISA lists it as used in ransomware campaigns.

How do I fix CVE-2025-3248?

Upgrade to a fixed version: langflow (PyPI) 1.3.0; langflow-base (PyPI) 0.3.0. CISA's 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.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

Related

Know the day a CVE lands in your code

Connect a GitHub repository and ZeusQA checks its dependencies daily, briefs each advisory and opens the fix. Three test runs free, no card.

Start freeSee how a run works