CVE-2026-28407

malcontent's nested archive extraction failure can drop content from scan inputs

CVSS 6.9 MEDIUMEPSS 0.2%CWE-703

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

malcontent is software for discovering supply-chain compromises through context, differential analysis, and YARA. Prior to version 1.21.0, malcontent would remove nested archives which failed to extract which could potentially leave malicious content. A better approach is to preserve these archives so that malcontent can attempt a best-effort scan of the archive bytes. Version 1.21.0 fixes the issue.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected products

chainguard-dev · malcontent

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References

https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9 https://github.com/chainguard-dev/malcontent/pull/1383 https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp