Fix CVEs in open source software without breaking your stack

Seal fixes unfixable vulnerabilities across the software supply chain with backported, in-place patches. By securing application dependencies, OS packages, and container images, Seal enables teams to reach audit-ready status faster without the risk of upgrades or breaking changes.

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Secure, scalable patching across your entire open source stack

Seal Security platform: vulnerable packages across Python, Java, JavaScript, Go, .NET, PHP and Debian, with django 3.2.25 open. The upstream fix is a major upgrade to Django 4.2; the Seal fix is 3.2.25+sp1, the same version with only the security patch.
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Discover your
vulnerable packages

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One click to Seal packages in all repos

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Remediate vulnerabilities independently from
dev teams

End-to-end
open source security

Secure open source vulnerabilities
without impacting your development

Strengthen your supply chain with patches for both direct and transitive dependencies.

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Uphold compliance and meet customer SLAs

Maintain vulnerability-free images to ensure you meet your customers' SLA requirements and successfully pass any security audit, including FedRAMP, PCI DSS 4.0, and NYDFS 500.

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Secure legacy and hard-to-manage code

Streamline the process of fixing security issues in old or legacy code. Address vulnerabilities in difficult-to-patch applications—even those outside your control.

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Secure containers and base images

Use our collection of regularly maintained base images or secure your existing images without upgrading—even if you're running older distributions.

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One platform to fix every
open source vulnerability

Seal Security diagram showing automatic backported patches applied to app dependencies, transitive dependencies, containers & images, legacy/EOL apps, and AI generated code, resulting in reduced risk, faster remediation, and continuous compliance.

Why customers choose Seal Security

We’ll fix critical and high CVEs across your apps, OS, and containers, so you stay protected and compliant without upgrades or complex migrations.

Automated remediation with control

Patch CVEs in the versions you already run without draining engineering resources. Maintain full visibility through clear approvals and tracking, ensuring every change is verified and intentional.

No roadmap disruption

Patch in place to avoid the upgrades, migrations, and breaking changes that stall releases. By remediating vulnerabilities in parallel, your product teams stay focused on shipping features.

Shorten the exploitation window

Move from discovery to resolution in hours, not weeks. Seal delivers production-ready patches for critical and high vulnerabilities on a defined SLA, preventing security debt from sitting in your backlog.

Fix the “unfixable”

Remediate vulnerabilities in legacy, EOL, and hard-to-maintain components where upgrades are risky or impossible. Eliminate critical findings even when upstream maintainers have moved on.

Pass every security scan

Keep builds clean of critical and high findings across application dependencies, OS packages, and container images. Make scan outcomes predictable, repeatable, and easier to prove during customer reviews and audits.

Verified, traceable packages

Strengthen your supply chain with audited patches and clear provenance for every fix. Documented verification ensures you can trust what you ship and provide transparency whenever it is requested.

Latest research and publications

eBook: Navigating FedRAMP compliance for open source
Whitepaper

Navigating FedRAMP Compliance for Open Source Software with Seal Security

What FedRAMP expects for open source: vulnerability scanning, remediation timelines, POA&M tracking, hardened baselines and SBOMs, and how to meet each requirement at every layer of the stack.

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Brochure: Consider your vulnerabilities SEALED
Brochure

Consider Your Open Source Vulnerabilities SEALED

Seal Security's AppSec Remediation Agent delivers human-vetted, production-ready fixes for open source vulnerabilities, with no upgrades, no code changes and no engineering involvement.

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Critical CVE-2025-55182 in React and Next.js
Update

CVSS 10.0 CVE in React & Next.js. Get a free patch!

A critical CVSS 10.0 RCE vulnerability (CVE-2025-55182) was disclosed in React and Next.js, allowing unauthenticated attackers to execute code through malformed payloads sent to React Server Components and Server Function endpoints. Get your free patch for CVE-2025-55182 and secure your React and Next.js apps.

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Frequently asked questions

Discover how Seal Security identifies and patches open source vulnerabilities without breaking changes.

Is Seal Security a scanning solution?
How does Seal provide patches?
How do I know that Seal won't break my code?
Which Linux distributions does Seal Security support?
How do I deploy Seal Security?
Does Seal Security support on-prem and air-gapped environments?
Do Seal Base Images include SBOMs and cryptographic signatures?
What programming languages does Seal Security support?
How does Seal Security help with compliance requirements?
What is Seal Security's SLA for new vulnerabilities?
Can Seal Security fix vulnerabilities before a CVE is published?
Where can I find Seal Security's documentation?