Vulnerability-Lookup

GHSA-XP3C-3JW3-4VCR

Vulnerability from github – Published: 2026-09-22 20:36 – Updated: 2026-09-22 20:36

Summary

OpenBao Skips Stricter Deny Policy for LIST operations

Details

Impact

When a policy operator has written capabilities = ["deny"] on a path with a trailing wildcard but allowed a broader list operation (e.g., a deny on secrets/metadata/restricted/* but allowed list on secrets/metadata/*), OpenBao would incorrectly allow the operation. This did not impact other operation types.

Patches

This has been patched in OpenBao v2.6.0.

Severity

6.0 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openbao/openbao"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20260713133043-f58d848c139e"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openbao/openbao"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.1.0"
            },
            {
              "last_affected": "1.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-63131"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-22T20:36:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Impact\n\nWhen a policy operator has written `capabilities = [\"deny\"]` on a path with a trailing wildcard but allowed a broader list operation (e.g., a `deny` on `secrets/metadata/restricted/*` but allowed `list` on `secrets/metadata/*`), OpenBao would incorrectly allow the operation. This did not impact other operation types.\n\n## Patches\n\nThis has been patched in OpenBao v2.6.0.",
  "id": "GHSA-xp3c-3jw3-4vcr",
  "modified": "2026-09-22T20:36:56Z",
  "published": "2026-09-22T20:36:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/pull/3389"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/pull/3474"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openbao/openbao"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/releases/tag/v2.6.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenBao Skips Stricter Deny Policy for LIST operations"
}

CVE-2026-63131 (GCVE-0-2026-63131)

Vulnerability from cvelistv5 – Published: 2026-09-23 17:59 – Updated: 2026-09-24 14:15

Title

OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)

Summary

OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao's vault/policy/acl.go could evaluate a broader wildcard ACL grant before more-specific trailing-wildcard ACL paths with capabilities = ["deny"] for a LIST operation. When a parent path permitted LIST and a child path was denied, the trailing-slash lookup could therefore allow listing the denied path. Other operation types are outside the repository advisory's affected scope. This issue is fixed in version 2.6.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/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 2026-09-24 14:14 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/openbao/openbao/security/advis…	x_refsource_CONFIRM
https://github.com/openbao/openbao/pull/3389	x_refsource_MISC
https://github.com/openbao/openbao/pull/3474	x_refsource_MISC
https://github.com/openbao/openbao/commit/2e9625d…	x_refsource_MISC
https://github.com/openbao/openbao/commit/f58d848…	x_refsource_MISC
https://github.com/hashicorp/vault/blob/main/CHAN…	x_refsource_MISC
https://github.com/openbao/openbao/releases/tag/v2.6.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
openbao	openbao	Affected: < 2.6.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-63131",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-24T14:14:55.010515Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-24T14:15:04.716Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "openbao",
          "vendor": "openbao",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.6.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao\u0027s vault/policy/acl.go could evaluate a broader wildcard ACL grant before more-specific trailing-wildcard ACL paths with capabilities = [\"deny\"] for a LIST operation. When a parent path permitted LIST and a child path was denied, the trailing-slash lookup could therefore allow listing the denied path. Other operation types are outside the repository advisory\u0027s affected scope. This issue is fixed in version 2.6.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T17:59:16.337Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr"
        },
        {
          "name": "https://github.com/openbao/openbao/pull/3389",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openbao/openbao/pull/3389"
        },
        {
          "name": "https://github.com/openbao/openbao/pull/3474",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openbao/openbao/pull/3474"
        },
        {
          "name": "https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a"
        },
        {
          "name": "https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc"
        },
        {
          "name": "https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203"
        },
        {
          "name": "https://github.com/openbao/openbao/releases/tag/v2.6.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openbao/openbao/releases/tag/v2.6.0"
        }
      ],
      "source": {
        "advisory": "GHSA-xp3c-3jw3-4vcr",
        "discovery": "UNKNOWN"
      },
      "title": "OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-63131",
    "datePublished": "2026-09-23T17:59:16.337Z",
    "dateReserved": "2026-07-15T16:54:55.817Z",
    "dateUpdated": "2026-09-24T14:15:04.716Z",
    "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