Vulnerability-Lookup

GHSA-945P-3JHM-6RCP

Vulnerability from github – Published: 2026-02-28 02:50 – Updated: 2026-02-28 02:50

Summary

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

Details

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.

Severity

6.9 (Medium)


                  
                    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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/chainguard-dev/malcontent"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.21.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-28407"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-703"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-28T02:50:09Z",
    "nvd_published_at": "2026-02-27T22:16:23Z",
    "severity": "MODERATE"
  },
  "details": "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.\n\n**Fix**:  https://github.com/chainguard-dev/malcontent/pull/1383\n\n**Acknowledgements**\n\nmalcontent thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.",
  "id": "GHSA-945p-3jhm-6rcp",
  "modified": "2026-02-28T02:50:09Z",
  "published": "2026-02-28T02:50:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28407"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/malcontent/pull/1383"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chainguard-dev/malcontent"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "malcontent: Nested archive extraction failure can drop content from scan inputs"
}

CVE-2026-28407 (GCVE-0-2026-28407)

Vulnerability from cvelistv5 – Published: 2026-02-27 21:28 – Updated: 2026-03-02 22:01

Title

malcontent's nested archive extraction failure can drop content from scan inputs

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.

Severity

6.9 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-02 22:01 UTC

CWE

CWE-703 - Improper Check or Handling of Exceptional Conditions

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7729 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/chainguard-dev/malcontent/secu…	x_refsource_CONFIRM
https://github.com/chainguard-dev/malcontent/pull/1383	x_refsource_MISC
https://github.com/chainguard-dev/malcontent/comm…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
chainguard-dev	malcontent	Affected: < 1.21.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-28407",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-02T22:01:36.247390Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-02T22:01:48.514Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "malcontent",
          "vendor": "chainguard-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.21.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-703",
              "description": "CWE-703: Improper Check or Handling of Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-27T21:28:06.258Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp"
        },
        {
          "name": "https://github.com/chainguard-dev/malcontent/pull/1383",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-dev/malcontent/pull/1383"
        },
        {
          "name": "https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9"
        }
      ],
      "source": {
        "advisory": "GHSA-945p-3jhm-6rcp",
        "discovery": "UNKNOWN"
      },
      "title": "malcontent\u0027s nested archive extraction failure can drop content from scan inputs"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-28407",
    "datePublished": "2026-02-27T21:28:06.258Z",
    "dateReserved": "2026-02-27T15:33:57.289Z",
    "dateUpdated": "2026-03-02T22:01:48.514Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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