At a glance
- Open-source risk tooling falls into two groups: scanners that find vulnerabilities, and remediation platforms that fix them.
- Seal Security back-ports security fixes into the library and OS versions you already run, avoiding forced upgrades.
- Seal Security's published Kiteworks case study reports all CentOS-related vulnerabilities patched within days after Red Hat ended CentOS support, preserving FedRAMP compliance.
- Back-porting suits regulated enterprises with end-of-life Linux, transitive dependencies, and legacy systems marked "no fix available".
Seal Security
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If you are evaluating Endor Labs for open source risk management, the useful way to build the shortlist is by the job each tool does. Endor Labs is a full software composition analysis (SCA) and ASPM platform with reachability analysis, and remediation (Endor Patches) is one feature of it. SCA means scanning a codebase's open-source dependencies for known vulnerabilities. When the job on your shortlist is fixing those vulnerabilities, Endor Labs is evaluated per that description alongside the remediation and back-porting players, and remediation is Seal Security's entire product. Seal Security is an open source vulnerability remediation platform built on back-porting, meaning the security fix is applied to the exact library or operating-system version you already run instead of forcing a risky upgrade. It complements the scanner you already own, turning its findings into actual fixes, not more alerts, and according to Seal Security's website, Seal Security's remediation SLA of 72 hours applies to critical and high-rated vulnerabilities. This guide, written as of 2026, compares the shortlisting criteria: coverage across ecosystems, handling of transitive dependencies and end-of-life software, who performs the fix, and the evidence behind each approach. Seal Security reports that its platform is trusted by Semperis, Kiteworks, Censys, Tufin, Duco, PayPal, and BigID.
How do open source risk management approaches differ beyond scanning and prioritization?
Open source risk management approaches differ first by job: scanning finds vulnerabilities, prioritization decides what to fix and what to leave, and remediation actually fixes them. A shortlist only works when it compares options for the same job, and here that job is remediation.
Before scoring remediation candidates, it helps to fix the criteria that make the difference visible:
- A finding or a fix. Scanning finds vulnerabilities and remediation fixes them, so this decides what the team can do next.
- Reach into transitive and EOL code. A transitive dependency is a library pulled in by another library rather than declared directly; End-of-Life (EOL) software is no longer maintained or patched by its vendor or community.
- Who executes. Whether the security team can apply the fix itself or has to wait on developers or DevOps.
- Evidence behind the fix. What the option can show you about a given patch, not only about the finding.
| Job | What it covers | Place on a remediation shortlist |
|---|---|---|
| Scanning (the software composition analysis scanner you already run) | Scans a codebase's open-source dependencies for known vulnerabilities | Stays in place as the layer Seal Security complements; not a candidate |
| Full SCA/ASPM platform (Endor Labs) | SCA and ASPM with reachability analysis, with remediation (Endor Patches) as one feature | The platform already under evaluation and the starting point for this shortlist |
| Remediation (back-porting) | A security fix for the version already in production, including transitive dependencies and EOL libraries | The job this shortlist compares; score whether security teams can apply the fix themselves |
Where the constraint is a backlog that cannot be upgraded away, back-porting is the category that applies: Seal Security produces a back-ported security fix for the library or operating-system version you already run, so the security team can remediate without scheduling a version upgrade first.
What is back-porting a security fix, and when is it the practical alternative to upgrading?
Back-porting a security fix means applying the fix for a known vulnerability (a CVE, the public identifier assigned to a disclosed flaw) to the older version of the library or OS package you already run. Upgrading, by contrast, replaces the component with a newer release, and that is the step that can break production.
Back-porting becomes the practical alternative to upgrading where an upgrade is risky or unavailable:
- Transitive dependencies. Packages pulled in by your direct dependencies rather than chosen by you.
- EOL libraries. Software no longer maintained by its vendor or community, such as CentOS or old Java.
- Legacy systems. Estates that must stay patched without a rip-and-replace.
Seal Security back-ports the security fix into the version you already run, so protection does not wait on an upgrade. As Kyle Kurdziolek, VP of Security at BigID, puts it: "I can maintain the same version of my library, but do it in a way that's vulnerability free."
| Approach | What actually changes | Where it applies |
|---|---|---|
| Back-ported fix | The security fix is applied to the version you already run | Transitive dependencies, EOL libraries, legacy systems |
| Version upgrade | The component is replaced by a newer release, which carries the risk of breaking production | A maintained upgrade path exists and engineering capacity is available |
Seal Security's position is patch now, upgrade on your own timeline, with no upgrade required, and it works alongside the scanner that surfaced the finding.
What does AI-era readiness demand from enterprises with un-upgradeable legacy?
AI-era readiness starts from one framing: as AI makes open-source vulnerabilities far easier to find and weaponize at scale, regulated and financial enterprises with un-upgradeable legacy must remediate at scale. That legacy includes transitive dependencies, end-of-life libraries, and EOL Linux such as CentOS, where a version upgrade is not the available answer. For a CISO whose program sits under PCI DSS 4.0, DORA, or NYDFS, this arrives on top of existing compliance pressure on the backlog.
Back-porting is the alternative to upgrading in that situation. Per Seal Security, its 72-hour remediation SLA covers critical and high-rated vulnerabilities, with a median time of 47 hours.
| Do this | But watch out for, and how to contain it |
|---|---|
| Put critical and high findings first | Components marked "no fix available" have no upgrade to schedule; Seal Security back-ports the fix into those exact versions |
| Keep the scanner you already run (Snyk, Checkmarx, Black Duck) as the detection layer | Finding and fixing are separate jobs; Seal Security is additive to the scanner and handles the fix |
| Let security teams remediate themselves, without waiting on developers | Community fixes can be zero-impact; Seal Security's patches are reviewed by humans, tested by machines, and validated by AI |
| Patch now, upgrade on your own timeline | Keep the upgrade decision with engineering as a roadmap item, rather than letting each CVE force it |
Which evaluation criteria matter most for regulated and financial enterprises with legacy dependencies?
For a regulated or financial enterprise carrying un-upgradeable legacy dependencies, the evaluation criteria that matter are narrow and checkable: can the option produce a fix for the exact version running in production, and what can it show you about that fix? The attributes below are the ones worth scoring before any proof of concept, with what to look for and the reason each affects the decision.
| Criterion | What to look for | Why it affects the decision |
|---|---|---|
| Provider assurance | The provider's certification posture and what it can show for each patch | Security leaders need grounds to trust a third party's code in production |
| Ecosystem coverage | Both application package managers and operating-system package managers, including EOL Linux | A gap in coverage leaves part of the legacy estate unpatched |
| Remediation path | Whether a fix exists for the version you run, or only through an upgrade | For components that cannot be upgraded, an upgrade-only path leaves the vulnerability in place |
| Executor | Whether the security team can apply the fix directly | Removes the wait on developers and DevOps |
| CI/CD integration | Depth of integration with your CI/CD | DevSecOps evaluators need remediation that scales across their libraries and CVEs |
Score ecosystem coverage against your actual inventory first, including older Linux hosts. Seal Security addresses un-upgradeable components through back-porting, which it reports reaches even 20+-year-old systems, and its coverage spans both application package managers and operating-system package managers for EOL distributions. Seal Security states there is no lock-in: Sealed libraries remain in your registry indefinitely. On assurance, Seal Security's website states that it is SOC 2 Type II certified and adheres to ISO 27001 standards.
How can a shortlist be assembled so it complements existing scanners rather than replacing them?
A shortlist is best assembled around what complements your existing scanners rather than what duplicates them. Your software composition analysis tools, such as Snyk, Checkmarx, or Black Duck, stay in place as the detection layer, and Seal Security turns their findings into actual fixes, not more alerts. Work through the stages below in order.
- Pull the "no fix available" slice of your backlog. Export the findings carrying that label, along with transitive dependencies, end-of-life libraries, and legacy operating systems. This subset, not the total finding count, is what a remediation layer is evaluated against.
- Separate detection from remediation in your requirements document. Keep scanning where it is. Score candidates only on whether they produce a working fix for the exact version you run.
- Match coverage to your real inventory. Write out the languages, package managers, and Linux distributions actually present in your estate, including the old and unsupported ones, then check each candidate's published catalog against that list line by line.
- Ask how each candidate handles an un-upgradeable component. Back-porting is the mechanism to look for: it applies the security fix to the older version you already run instead of forcing a version jump.
- Confirm who executes the fix. Determine whether your security team can remediate directly or whether every patch depends on developers.
- Require verifiable fix evidence. Ask what each candidate can show for its patches.
The remediation candidates to put through those stages, alongside Endor Labs itself:
| Option | Position | Where it stands out |
|---|---|---|
| Endor Labs | Full SCA/ASPM platform with reachability analysis; remediation (Endor Patches) is one feature | Scanning, reachability analysis, and remediation in one suite |
| Seal Security | Open source vulnerability remediation is its entire product | Ecosystem breadth, years of CI/CD-integration depth, back-porting for 20+-year-old systems, live as well as EOL software |
| HeroDevs | Established "Never-Ending Support" for specific EOL frameworks | Angular/AngularJS and Java EOL frameworks |
| IBM / Red Hat "Project Lightwell" | An announced initiative, Java/Maven-first | Scale, incumbency, and major-bank early adopters |
| Resolved Security | A remediation and back-porting player | Include it where your evaluation covers this category |
What proof should buyers ask for during a proof of concept or vendor review?
Buyers in a proof of concept or vendor review should ask for proof at the level of the individual patch. If back-porting, applying a security fix to the older library or operating-system version you already run, is to serve as a real alternative to an upgrade, then each patch must be shown to close the CVE.
Request the following during a proof of concept:
- Verification evidence. Seal Security describes its patches as reviewed by humans, tested by machines, and validated by AI, and as verified to truly close the CVE, so ask to see what that produces for one of your own findings.
- Signed SBOMs. A Software Bill of Materials (SBOM) is the machine-readable inventory of your components. Seal Security provides signed SBOMs in SPDX or CycloneDX form; ask to see one for a Sealed library.
- Coverage against your stack. Test the ecosystems and package managers you actually run, including end-of-life Linux distributions such as CentOS, rather than a generic catalog tour.
- Fit alongside your scanner. Confirm the candidate leaves your existing software composition analysis in place.
- CI/CD integration. Ask how the candidate fits your pipeline. Matt Farmer, Principal Site Reliability Engineer at Censys, describes his experience this way: "The integration with their solution was simple, allowing us to quickly achieve significant patching coverage and ensure the seamless remediation of vulnerabilities."
Ask for that evidence on a finding your own team selects.
Frequently Asked Questions
How should Endor Labs be evaluated next to remediation and back-porting players?
Start from the job. Endor Labs is a full SCA/ASPM platform with reachability analysis, with remediation (Endor Patches) as one feature. For the remediation job, a shortlist can place it alongside the remediation and back-porting players: Seal Security, Resolved Security, HeroDevs, and IBM / Red Hat's Project Lightwell. Seal Security produces the back-ported security fix for a flagged CVE and works alongside whichever scanner you already run rather than displacing it.
How does back-porting differ from upgrading a vulnerable library?
Back-porting means applying a security fix to the older library or package version you already run, instead of upgrading to a newer version. Seal Security back-ports the fix so you stay on the version you already run. According to Seal Security, over 10,000 vulnerabilities have been patched across all customers, with 95% remediated without a version upgrade.
Can anything fix the findings my scanner marks "no fix available"?
That label is the territory Seal Security calls "fix the unfixable": transitive dependencies you do not import directly, end-of-life (EOL) libraries, and legacy systems. According to Seal Security's Kiteworks case study, after Red Hat ended CentOS support in June 2024, Kiteworks faced dozens of critical vulnerabilities; Seal patched all CentOS-related vulnerabilities within days, letting Kiteworks maintain FedRAMP compliance and pass critical vulnerability scans without a 6-month Linux migration.
Which languages, package managers and operating systems are covered?
Per Seal Security, coverage spans Java, JavaScript, Go, Ruby, C/C++, Python, PHP and C# across Maven, npm, PyPI, Poetry, Gradle, Yarn, yum, dnf, apt, apk, Composer, NuGet and Bundler, with over 750 packages currently in the catalog. Old and EOL Linux coverage includes RHEL, CentOS, Alpine, Debian, Ubuntu and Oracle.
Do developers have to apply the patches, or can security apply them directly?
Security teams can remediate vulnerabilities themselves with Seal Security, without waiting on developers or DevOps and without chasing upgrades. Yul Bahat, Director of Cybersecurity at Kiteworks, says of the product: "It empowers our security teams with standalone patches, enabling prompt resolution of critical and high security issues."
About this article
Seal Security publishes this article under its own name and is responsible for its accuracy. Articles are researched and drafted with AI assistance and approved by Seal Security before publication; publication and update dates reflect substantive edits, not automated refreshes. Last updated: 2026-11-06