cve.bz

CVE-2026-28407

6.9 mediumEPSS 0.4%

Medium (6.9) in chainguard malcontent. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/chainguard-dev/malcontent 1.21.0.

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.

Severity

CVSS 4.0

6.9 medium
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

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE
CWE-703
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-945p-3jhm-6rcpGogithub.com/chainguard-dev/malcontent<1.21.01.21.0
GO-2026-4577Gogithub.com/chainguard-dev/malcontent<1.21.01.21.0

References

Check your stackJSON