Vulnerability-Lookup

GHSA-7RP8-R62P-Q6WC

Vulnerability from github – Published: 2026-03-02 22:04 – Updated: 2026-07-07 13:10

Summary

`melange update-cache` has unbounded HTTP download that can exhaust disk in CI

Details

melange update-cache downloads URIs from build configs via io.Copy without any size limit or HTTP client timeout (pkg/renovate/cache/cache.go). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runner. Affected versions <= 0.40.5.

Fix: Merged Acknowledgements

Thank you to Oleh Konko from 1seal for discovering and reporting this issue.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "chainguard.dev/melange"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.43.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-29049"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-02T22:04:23Z",
    "nvd_published_at": "2026-03-06T07:16:02Z",
    "severity": "MODERATE"
  },
  "details": "`melange update-cache` downloads URIs from build configs via `io.Copy` without any size limit or HTTP client timeout (`pkg/renovate/cache/cache.go`). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runner. Affected versions \u003c= 0.40.5.\n\n**Fix:** Merged\n**Acknowledgements**\n\nThank you to Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.",
  "id": "GHSA-7rp8-r62p-q6wc",
  "modified": "2026-07-07T13:10:50Z",
  "published": "2026-03-02T22:04:23Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29049"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/pull/2379"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fac8398d23f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chainguard-dev/melange"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/releases/tag/v0.43.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "`melange update-cache` has unbounded HTTP download that can exhaust disk in CI"
}

CVE-2026-29049 (GCVE-0-2026-29049)

Vulnerability from cvelistv5 – Published: 2026-03-06 07:03 – Updated: 2026-07-07 13:10

Title

melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI

Summary

melange allows users to build apk packages using declarative pipelines. In version 0.40.5 and prior, melange update-cache downloads URIs from build configs via io.Copy without any size limit or HTTP client timeout (pkg/renovate/cache/cache.go). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runne. Version 0.43.4 contains a patch.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-09 20:00 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/chainguard-dev/melange/securit…	x_refsource_CONFIRM
https://github.com/chainguard-dev/melange/pull/2379	x_refsource_MISC
https://github.com/chainguard-dev/melange/commit/…	x_refsource_MISC
https://github.com/chainguard-dev/melange/release…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
chainguard-dev	melange	Affected: < 0.43.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-29049",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-09T20:00:02.881191Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-09T20:00:19.899Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "melange",
          "vendor": "chainguard-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.43.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "melange allows users to build apk packages using declarative pipelines. In version 0.40.5 and prior, melange update-cache downloads URIs from build configs via io.Copy without any size limit or HTTP client timeout (pkg/renovate/cache/cache.go). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runne. Version 0.43.4 contains a patch."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-07T13:10:28.323Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wc",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wc"
        },
        {
          "name": "https://github.com/chainguard-dev/melange/pull/2379",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-dev/melange/pull/2379"
        },
        {
          "name": "https://github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fac8398d23f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fac8398d23f"
        },
        {
          "name": "https://github.com/chainguard-dev/melange/releases/tag/v0.43.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-dev/melange/releases/tag/v0.43.4"
        }
      ],
      "source": {
        "advisory": "GHSA-7rp8-r62p-q6wc",
        "discovery": "UNKNOWN"
      },
      "title": "melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-29049",
    "datePublished": "2026-03-06T07:03:10.361Z",
    "dateReserved": "2026-03-03T17:50:11.243Z",
    "dateUpdated": "2026-07-07T13:10:28.323Z",
    "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-7RP8-R62P-Q6WC

CVE-2026-29049 (GCVE-0-2026-29049)

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