SBOM in M&A Due Diligence: How Open Source Risk Is Reshaping Software Acquisitions

In 2022, the Synopsys OSSRA report noted that 97% of codebases audited during M&A due diligence contained open source, with 81% containing at least one known vulnerability. These numbers have not improved significantly since. Open source risk in software acquisitions is not a niche concern — it is a universal feature of software M&A that can materially affect deal terms, valuations, and post-close integration costs.

What SBOM-Based Due Diligence Reveals

When an acquirer runs SBOM-based due diligence on a target's codebase, four categories of findings are common. License violations — particularly undisclosed copyleft dependencies that could require opening proprietary code — can create representations and warranties liabilities if not disclosed before close. Critical vulnerabilities in products that will be distributed post-acquisition create inherited security risk that may require immediate remediation investment. Abandoned or end-of-life dependencies signal technical debt that will require investment to maintain post-acquisition. And SBOM-generation gaps — codebases where SBOM generation is not possible because build systems are undocumented or broken — signal engineering process immaturity.

How Findings Affect Deal Structure

Material open source risk findings affect M&A transactions in several ways. License violations involving GPL-licensed components in commercial products may require escrow arrangements or price adjustments. Critical vulnerability findings in customer-facing products may require representations that vulnerabilities will be patched within a specified timeframe post-close. Systemic open source governance failures may trigger requests for indemnification clauses covering future license enforcement claims. In severe cases — particularly where copyleft exposure threatens the acquirer's own IP portfolio — findings have led to deal termination.

Seller Preparation: SBOM Readiness as a Value Signal

Acquisition targets that have mature SBOM programs — continuous component inventories, clean license histories, documented vulnerability management — command better valuations and experience smoother due diligence processes. Sophisticated buyers recognize that SBOM maturity indicates overall engineering process quality. Preparing for acquisition by implementing a comprehensive SCA program is increasingly recommended by M&A advisors as a value-building activity in the 12-18 months before a planned exit.

The Post-Acquisition Integration Challenge

Even when pre-close due diligence is thorough, post-acquisition integration of SBOM programs across previously separate organizations is a significant challenge. Different teams use different tools, policies, and formats. Bringing an acquired codebase into the acquirer's SBOM management framework requires both technical integration (connecting the acquired team's build pipelines to the acquirer's SBOM platform) and process alignment (applying the acquirer's license policies and vulnerability management SLAs to the acquired codebase).

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// Author: Esteban C.