CVE-2026-28407

Name: CVE-2026-28407
Creator: NVD / NIST
Published: 2026-02-27T22:16:23.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2026-28407 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS 4.0

6.9/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.22%

12.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-703

Affected Software

Vendor	Product	Versions
Chainguard	Malcontent	< 1.21.0

References

https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9Patch
https://github.com/chainguard-dev/malcontent/pull/1383Issue Tracking, Patch
https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcpPatch, Vendor Advisory

Timeline

Published: Feb 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-28407?

How severe is CVE-2026-28407?

CVE-2026-28407 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-28407?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-28407?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST