CVE-2026-76256 (GCVE-0-2026-76256)

Vulnerability from cvelistv5 – Published: 2026-08-19 21:34 – Updated: 2026-08-26 15:23
VLAI
Title
Information Exposure through REST API Endpoints in Splunk Secure Gateway
Summary
In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the "admin" or "power" Splunk roles could read sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 14:49 UTC
CWE
  • CWE-200 - The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Assigner
References
Impacted products
Vendor Product Version
Splunk Splunk Enterprise Affected: 10.4 , < 10.4.2 (custom)
Affected: 10.2 , < 10.2.6 (custom)
Affected: 10.0 , < 10.0.9 (custom)
Affected: 9.4 , < 9.4.14 (custom)
Create a notification for this product.
Splunk Splunk Secure Gateway Affected: 3.10 , < 3.10.9 (custom)
Affected: 3.9 , < 3.9.23 (custom)
Affected: 3.8 , < 3.8.70 (custom)
Create a notification for this product.
Date Public
2026-08-19 00:00
Credits
Gabriel Nitu, Splunk
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-76256",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-26T14:49:05.714512Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-26T15:23:35.816Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "modules": [
            "Splunk Secure Gateway"
          ],
          "product": "Splunk Enterprise",
          "vendor": "Splunk",
          "versions": [
            {
              "lessThan": "10.4.2",
              "status": "affected",
              "version": "10.4",
              "versionType": "custom"
            },
            {
              "lessThan": "10.2.6",
              "status": "affected",
              "version": "10.2",
              "versionType": "custom"
            },
            {
              "lessThan": "10.0.9",
              "status": "affected",
              "version": "10.0",
              "versionType": "custom"
            },
            {
              "lessThan": "9.4.14",
              "status": "affected",
              "version": "9.4",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Splunk Secure Gateway",
          "vendor": "Splunk",
          "versions": [
            {
              "lessThan": "3.10.9",
              "status": "affected",
              "version": "3.10",
              "versionType": "custom"
            },
            {
              "lessThan": "3.9.23",
              "status": "affected",
              "version": "3.9",
              "versionType": "custom"
            },
            {
              "lessThan": "3.8.70",
              "status": "affected",
              "version": "3.8",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Gabriel Nitu, Splunk"
        }
      ],
      "datePublic": "2026-08-19T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/markdown",
              "value": "In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the \"admin\" or \"power\" Splunk roles could read sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information."
            }
          ],
          "value": "In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the \"admin\" or \"power\" Splunk roles could read sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T21:34:15.368Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "url": "https://advisory.splunk.com/advisories/SVD-2026-0801"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, and 9.4.14, or higher."
        }
      ],
      "source": {
        "advisory": "SVD-2026-0801"
      },
      "title": "Information Exposure through REST API Endpoints in Splunk Secure Gateway",
      "workarounds": [
        {
          "lang": "en",
          "value": "Upgrade Splunk Secure Gateway to versions 3.10.9, 3.9.23, and 3.8.70, or higher. If you are not able to upgrade Splunk Enterprise or Splunk Secure Gateway, turn off or remove the Splunk Secure Gateway app. See [Manage app and add-on objects](https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.2/meet-splunk-apps/manage-app-and-add-on-objects) in the Splunk documentation. Note: Splunk Mobile, Spacebridge, and Mission Control rely on functionality in the Splunk Secure Gateway app. If you do not use any of these apps, features, or functionality, as a potential mitigation, you may turn off or remove the app."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-76256",
    "datePublished": "2026-08-19T21:34:15.368Z",
    "dateReserved": "2026-08-19T12:02:03.619Z",
    "dateUpdated": "2026-08-26T15:23:35.816Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-76256",
      "date": "2026-10-01",
      "epss": "0.00301",
      "percentile": "0.20656"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "modules": [
                  "Splunk Secure Gateway"
                ],
                "product": "Splunk Enterprise",
                "vendor": "Splunk",
                "versions": [
                  {
                    "lessThan": "10.4.2",
                    "status": "affected",
                    "version": "10.4",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "10.2.6",
                    "status": "affected",
                    "version": "10.2",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "10.0.9",
                    "status": "affected",
                    "version": "10.0",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "9.4.14",
                    "status": "affected",
                    "version": "9.4",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "Splunk Secure Gateway",
                "vendor": "Splunk",
                "versions": [
                  {
                    "lessThan": "3.10.9",
                    "status": "affected",
                    "version": "3.10",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "3.9.23",
                    "status": "affected",
                    "version": "3.9",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "3.8.70",
                    "status": "affected",
                    "version": "3.8",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "psirt@cisco.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "E180CC4C-5B8B-4D69-8535-93DCF3510119",
                    "versionEndExcluding": "9.4.14",
                    "versionStartIncluding": "9.4.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "0FD75354-A6EE-49F9-9B8A-31287A845CFB",
                    "versionEndExcluding": "10.0.9",
                    "versionStartIncluding": "10.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "C8FDA841-04BC-404C-B56D-7869CBD8B56C",
                    "versionEndExcluding": "10.2.6",
                    "versionStartIncluding": "10.2.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "209C1DE6-893D-424D-B103-B64A314AD8DC",
                    "versionEndExcluding": "10.4.2",
                    "versionStartIncluding": "10.4.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FC3EC4A6-9C00-49CB-92DC-97F21C4E1BC1",
                    "versionEndExcluding": "3.8.70",
                    "versionStartIncluding": "3.8.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "46A65041-64F2-4459-A7CB-947129FA9BEA",
                    "versionEndExcluding": "3.9.23",
                    "versionStartIncluding": "3.9.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "84D6A11D-4EA4-4D38-B8A1-4E0D2627B245",
                    "versionEndExcluding": "3.10.9",
                    "versionStartIncluding": "3.10.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the \"admin\" or \"power\" Splunk roles could read sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information."
          }
        ],
        "id": "CVE-2026-76256",
        "lastModified": "2026-08-26T16:16:38.603",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "psirt@cisco.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-76256",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-26T14:49:05.714512Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-08-19T22:17:13.543",
        "references": [
          {
            "source": "psirt@cisco.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://advisory.splunk.com/advisories/SVD-2026-0801"
          }
        ],
        "sourceIdentifier": "psirt@cisco.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-200"
              }
            ],
            "source": "psirt@cisco.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-76256",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-26T14:49:05.714512Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-26T14:49:07.171Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "modules": [
                "Splunk Secure Gateway"
              ],
              "product": "Splunk Enterprise",
              "vendor": "Splunk",
              "versions": [
                {
                  "lessThan": "10.4.2",
                  "status": "affected",
                  "version": "10.4",
                  "versionType": "custom"
                },
                {
                  "lessThan": "10.2.6",
                  "status": "affected",
                  "version": "10.2",
                  "versionType": "custom"
                },
                {
                  "lessThan": "10.0.9",
                  "status": "affected",
                  "version": "10.0",
                  "versionType": "custom"
                },
                {
                  "lessThan": "9.4.14",
                  "status": "affected",
                  "version": "9.4",
                  "versionType": "custom"
                }
              ]
            },
            {
              "product": "Splunk Secure Gateway",
              "vendor": "Splunk",
              "versions": [
                {
                  "lessThan": "3.10.9",
                  "status": "affected",
                  "version": "3.10",
                  "versionType": "custom"
                },
                {
                  "lessThan": "3.9.23",
                  "status": "affected",
                  "version": "3.9",
                  "versionType": "custom"
                },
                {
                  "lessThan": "3.8.70",
                  "status": "affected",
                  "version": "3.8",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "reporter",
              "value": "Gabriel Nitu, Splunk"
            }
          ],
          "datePublic": "2026-08-19T00:00:00.000Z",
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the \"admin\" or \"power\" Splunk roles could read sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information."
                }
              ],
              "value": "In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the \"admin\" or \"power\" Splunk roles could read sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-200",
                  "description": "The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.",
                  "lang": "en",
                  "type": "cwe"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-19T21:34:15.368Z",
            "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
            "shortName": "cisco"
          },
          "references": [
            {
              "url": "https://advisory.splunk.com/advisories/SVD-2026-0801"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "value": "Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, and 9.4.14, or higher."
            }
          ],
          "source": {
            "advisory": "SVD-2026-0801"
          },
          "title": "Information Exposure through REST API Endpoints in Splunk Secure Gateway",
          "workarounds": [
            {
              "lang": "en",
              "value": "Upgrade Splunk Secure Gateway to versions 3.10.9, 3.9.23, and 3.8.70, or higher. If you are not able to upgrade Splunk Enterprise or Splunk Secure Gateway, turn off or remove the Splunk Secure Gateway app. See [Manage app and add-on objects](https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.2/meet-splunk-apps/manage-app-and-add-on-objects) in the Splunk documentation. Note: Splunk Mobile, Spacebridge, and Mission Control rely on functionality in the Splunk Secure Gateway app. If you do not use any of these apps, features, or functionality, as a potential mitigation, you may turn off or remove the app."
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "assignerShortName": "cisco",
        "cveId": "CVE-2026-76256",
        "datePublished": "2026-08-19T21:34:15.368Z",
        "dateReserved": "2026-08-19T12:02:03.619Z",
        "dateUpdated": "2026-08-26T15:23:35.816Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.