malcontent's nested archive extraction failure can drop content from scan inputs
Priority LOW 31CWE-703Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00411 35th percentileScored 2026-11-07
Fix Fixed malcontent (chainguard-dev): 1.21.0github.com/chainguard-dev/malcontent (Go): 1.21.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| chainguard-dev | malcontent | before 1.21.0 | 1.21.0 | Patch available | CNA |
| — | github.com/chainguard-dev/malcontent (Go) | before 1.21.0 | 1.21.0 | Patch available | GHSA-945p-3jhm-6rcp |
- malcontent Vendorchainguard-dev Affected before 1.21.0 Fixed in 1.21.0 Patch available CNA
- github.com/chainguard-dev/malcontent (Go) Vendor— Affected before 1.21.0 Fixed in 1.21.0 Patch available GHSA-945p-3jhm-6rcp
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:chainguard:malcontent:*:*:*:*:*:*:*:* | before 1.21.0 | Vulnerable | chainguard-dev |
- cpe:2.3:a:chainguard:malcontent:*:*:*:*:*:*:*:* Versions before 1.21.0 Vulnerable ·chainguard-dev
Remediation
- Fix · CNA malcontent (chainguard-dev) Fixed in 1.21.0
- Fix · GHSA-945p-3jhm-6rcp github.com/chainguard-dev/malcontent (Go) Fixed in 1.21.0 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-28407
- 2026-10-03 Alias added: GHSA-945p-3jhm-6rcp
References
Patch 3
More chainguard-dev Malcontent vulnerabilities
- TI-2026-20044 malcontent's OCI image scanning could expose registry credentials CVSS 3.1MEDIUM 6.5
- TI-2026-20045 malcontent's archive extraction could write outside extraction directory CVSS 3.1MEDIUM 5.5
Sources
- CVE-2026-28407 · CVE Program
- CVE-2026-28407 · NVD
- FIRST EPSS
- GHSA-945p-3jhm-6rcp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-28407 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences