CVE-2026-28407
malcontent's nested archive extraction failure can drop content from scan inputs
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.
INFO
Published Date :
Feb. 27, 2026, 10:16 p.m.
Last Modified :
March 3, 2026, 6:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update malcontent to version 1.21.0 or later.
- Preserve nested archives for scanning.
- Review malcontent's extraction behavior.
- Scan archive bytes with best-effort.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-28407.
| URL | Resource |
|---|---|
| https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9 | Patch |
| https://github.com/chainguard-dev/malcontent/pull/1383 | Issue Tracking Patch |
| https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-28407 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-28407
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-28407 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-28407 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 03, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:chainguard:malcontent:*:*:*:*:*:*:*:* versions up to (excluding) 1.21.0 Added Reference Type GitHub, Inc.: https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/chainguard-dev/malcontent/pull/1383 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
Feb. 27, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CWE CWE-703 Added Reference https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9 Added Reference https://github.com/chainguard-dev/malcontent/pull/1383 Added Reference https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp