What is CVE-2026-28407?

CVE-2026-28407 is a medium-severity vulnerability in Chainguard Malcontent, classified under CWE-703. CVSS score: 5.3/10. Published 2026-02-27.

How severe is CVE-2026-28407?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Chainguard Malcontent

CVE-2026-28407

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 malici…

EPSS: 0.002 (12.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Chainguard Malcontent
Chainguard-dev Malcontent — versions < 1.21.0

Weakness classification (CWE)

CWE-703

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-28407?: CVE-2026-28407 is a medium-severity vulnerability in Chainguard Malcontent, classified under CWE-703. CVSS score: 5.3/10. Published 2026-02-27.
How severe is CVE-2026-28407?: Medium severity. CVSS v3 base score is 5.3 out of 10.