Vulnerability-Lookup

GHSA-72X6-4J93-7W86

Vulnerability from github – Published: 2026-08-19 20:24 – Updated: 2026-08-19 20:24

Summary

BuildKit has a possible runtime DoS via unbounded group parsing

Details

Impact

Maliciously crafted base image or build can cause a Denial of Service (DoS) condition. When creating a container from this image, memory exhaustion occurs, leading to an Out Of Memory (OOM) kill of the buildkitd process.

Patches

Issue is fixed in BuildKit v0.31.1+

Workarounds

Use trusted build sources.

References

This is BuildKit variant of containerd advisory https://github.com/containerd/containerd/security/advisories/GHSA-jpcc-p29g-p8mq

Severity

2.3 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.31.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/moby/buildkit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.31.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-61712"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-19T20:24:01Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Impact\nMaliciously crafted base image or build can cause a Denial of Service (DoS) condition. When creating a container from this image, memory exhaustion occurs, leading to an Out Of Memory (OOM) kill of the buildkitd process.\n\n### Patches\nIssue is fixed in BuildKit v0.31.1+\n\n### Workarounds\nUse trusted build sources.\n\n### References\nThis is BuildKit variant of containerd advisory https://github.com/containerd/containerd/security/advisories/GHSA-jpcc-p29g-p8mq",
  "id": "GHSA-72x6-4j93-7w86",
  "modified": "2026-08-19T20:24:01Z",
  "published": "2026-08-19T20:24:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/moby/buildkit/security/advisories/GHSA-72x6-4j93-7w86"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/buildkit/commit/408266e4ba254cecabedaacdad6905de4d2a75a1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/buildkit/commit/69a3924648e485acb3faad3081e03a8554431255"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/moby/buildkit"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/buildkit/releases/tag/v0.31.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "BuildKit has a possible runtime DoS via unbounded group parsing"
}

CVE-2026-61712 (GCVE-0-2026-61712)

Vulnerability from cvelistv5 – Published: 2026-08-19 20:01 – Updated: 2026-08-21 19:04

Title

BuildKit: Possible runtime DoS via unbounded group parsing

Summary

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, BuildKit read attacker-controlled /etc/passwd and /etc/group files without an upper bound while resolving a username to a user identifier or group identifier in executor/oci/user.go and solver/llbsolver/ops/user_linux.go. A malicious base image or build could provide oversized files that exhausted memory during user resolution and caused out-of-memory termination of the buildkitd process. This issue is fixed in version 0.31.1.

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 19:04 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/moby/buildkit/security/advisor…	x_refsource_CONFIRM
https://github.com/moby/buildkit/commit/408266e4b…	x_refsource_MISC
https://github.com/moby/buildkit/commit/69a392464…	x_refsource_MISC
https://github.com/moby/buildkit/releases/tag/v0.31.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
moby	buildkit	Affected: < 0.31.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-61712",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T19:04:21.592888Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-21T19:04:32.635Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "buildkit",
          "vendor": "moby",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.31.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, BuildKit read attacker-controlled /etc/passwd and /etc/group files without an upper bound while resolving a username to a user identifier or group identifier in executor/oci/user.go and solver/llbsolver/ops/user_linux.go. A malicious base image or build could provide oversized files that exhausted memory during user resolution and caused out-of-memory termination of the buildkitd process. This issue is fixed in version 0.31.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.3,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T20:01:18.074Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/moby/buildkit/security/advisories/GHSA-72x6-4j93-7w86",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/moby/buildkit/security/advisories/GHSA-72x6-4j93-7w86"
        },
        {
          "name": "https://github.com/moby/buildkit/commit/408266e4ba254cecabedaacdad6905de4d2a75a1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/moby/buildkit/commit/408266e4ba254cecabedaacdad6905de4d2a75a1"
        },
        {
          "name": "https://github.com/moby/buildkit/commit/69a3924648e485acb3faad3081e03a8554431255",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/moby/buildkit/commit/69a3924648e485acb3faad3081e03a8554431255"
        },
        {
          "name": "https://github.com/moby/buildkit/releases/tag/v0.31.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/moby/buildkit/releases/tag/v0.31.1"
        }
      ],
      "source": {
        "advisory": "GHSA-72x6-4j93-7w86",
        "discovery": "UNKNOWN"
      },
      "title": "BuildKit: Possible runtime DoS via unbounded group parsing"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-61712",
    "datePublished": "2026-08-19T20:01:18.074Z",
    "dateReserved": "2026-07-10T18:51:13.920Z",
    "dateUpdated": "2026-08-21T19:04:32.635Z",
    "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.

Action not permitted

GHSA-72X6-4J93-7W86

Impact

Patches

Workarounds

References

CVE-2026-61712 (GCVE-0-2026-61712)

Tags

Sightings

Nomenclature

Related by attack behaviour