chainguard-dev malcontent up to 1.20.x improper check or handling of exceptional conditions

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in chainguard-dev malcontent up to 1.20.x. Affected by this vulnerability is an unknown functionality. Performing a manipulation results in improper check or handling of exceptional conditions. This vulnerability is cataloged as CVE-2026-28407. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in chainguard-dev malcontent up to 1.20.x. This affects some unknown processing. The manipulation with an unknown input leads to a improper check or handling of exceptional conditions vulnerability. CWE is classifying the issue as CWE-703. The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product. This is going to have an impact on integrity. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-28407 since 02/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.21.0 eliminates this vulnerability. Applying the patch 356c56659ccfcad0b249a97de8cf71f151ed3ee9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-9078). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper check or handling of exceptional conditions
CWE: CWE-703
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: malcontent 1.21.0
Patch: 356c56659ccfcad0b249a97de8cf71f151ed3ee9

Timelineinfo

02/27/2026 CVE reserved
02/28/2026 +1 days Advisory disclosed
02/28/2026 +0 days VulDB entry created
03/03/2026 +3 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-945p-3jhm-6rcp
Status: Confirmed

CVE: CVE-2026-28407 (🔒)
GCVE (CVE): GCVE-0-2026-28407
GCVE (VulDB): GCVE-100-348249
EUVD: 🔒

Entryinfo

Created: 02/28/2026 03:00
Updated: 03/03/2026 21:39
Changes: 02/28/2026 03:00 (68), 02/28/2026 06:01 (1), 03/03/2026 21:39 (10)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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