malcontent: Nested archive extraction failure can drop content from scan inputs

CVE-2026-28407 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Previously, 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.

Fix: https://github.com/chainguard-dev/malcontent/pull/1383

Acknowledgements

malcontent thanks Oleh Konko from 1seal for discovering and reporting this issue.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-02-28 02:50:09 UTC
Updated
2026-02-28 02:50:09 UTC
GitHub reviewed
2026-02-28 02:50:09 UTC
NVD published
2026-02-27

EPSS Score

Score Percentile
0.03% 9.96%

CVSS Scores

Base score Version Severity Vector
6.9 4.0 —
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 Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:N)
No confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:L)
Limited integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:N)
No availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-945p-3jhm-6rcp ↗
CVE CVE-2026-28407 ↗

CWEs

CWE id Name
CWE-703 Improper Check or Handling of Exceptional Conditions

Credits

  • 1seal (reporter)
  • egibs (remediation_developer)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
go github.com/chainguard-dev/malcontent < 1.21.0 1.21.0 —

References

cvelogic Threat Intelligence