CVE-2026-76267 (GCVE-0-2026-76267)

Vulnerability from cvelistv5 – Published: 2026-10-07 20:46 – Updated: 2026-10-07 20:46
VLAI
Title
Log Injection through the REST API in Splunk App for Splunk O11y Cloud
Summary
In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a user that holds a role with the read_o11y_content capability could inject forged entries into the app log through the Representational State Transfer (REST) API. The vulnerability is possible because Splunk App for Splunk O11y Cloud does not neutralize user-supplied SignalFlow content before writing it to the app log. Splunk Enterprise versions 9.4.x are not affected.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-117 - The software does not neutralize or incorrectly neutralizes output that is written to logs.
Assigner
References
Impacted products
Vendor Product Version CPE status
Splunk Splunk Enterprise Affected: 10.4 , < 10.4.3 (custom)
Affected: 10.2 , < 10.2.7 (custom)
Affected: 10.0 , < 10.0.10 (custom)
guessed Create a notification for this product.
Date Public
2026-10-07 00:00
Credits
Gabriel Nitu, Splunk
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "modules": [
            "REST API"
          ],
          "product": "Splunk Enterprise",
          "vendor": "Splunk",
          "versions": [
            {
              "lessThan": "10.4.3",
              "status": "affected",
              "version": "10.4",
              "versionType": "custom"
            },
            {
              "lessThan": "10.2.7",
              "status": "affected",
              "version": "10.2",
              "versionType": "custom"
            },
            {
              "lessThan": "10.0.10",
              "status": "affected",
              "version": "10.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Gabriel Nitu, Splunk"
        }
      ],
      "datePublic": "2026-10-07T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/markdown",
              "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a user that holds a role with the `read_o11y_content` capability could inject forged entries into the app log through the Representational State Transfer (REST) API. The vulnerability is possible because Splunk App for Splunk O11y Cloud does not neutralize user-supplied SignalFlow content before writing it to the app log.\n\nSplunk Enterprise versions 9.4.x are not affected."
            }
          ],
          "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a user that holds a role with the read_o11y_content capability could inject forged entries into the app log through the Representational State Transfer (REST) API. The vulnerability is possible because Splunk App for Splunk O11y Cloud does not neutralize user-supplied SignalFlow content before writing it to the app log.\n\nSplunk Enterprise versions 9.4.x are not affected."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-117",
              "description": "The software does not neutralize or incorrectly neutralizes output that is written to logs.",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T20:46:30.339Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "url": "https://advisory.splunk.com/advisories/SVD-2026-1001"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade Splunk Enterprise to versions 10.4.3, 10.2.7, 10.0.10, and 9.4.15, or higher."
        }
      ],
      "source": {
        "advisory": "SVD-2026-1001",
        "discovery": "INTERNAL"
      },
      "title": "Log Injection through the REST API in Splunk App for Splunk O11y Cloud",
      "workarounds": [
        {
          "lang": "en",
          "value": "Turn off or remove the Splunk App for Splunk O11y Cloud. For more information 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."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-76267",
    "datePublished": "2026-10-07T20:46:30.339Z",
    "dateReserved": "2026-08-19T12:02:03.620Z",
    "dateUpdated": "2026-10-07T20:46:30.339Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "modules": [
                  "REST API"
                ],
                "product": "Splunk Enterprise",
                "vendor": "Splunk",
                "versions": [
                  {
                    "lessThan": "10.4.3",
                    "status": "affected",
                    "version": "10.4",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "10.2.7",
                    "status": "affected",
                    "version": "10.2",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "10.0.10",
                    "status": "affected",
                    "version": "10.0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "psirt@cisco.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a user that holds a role with the read_o11y_content capability could inject forged entries into the app log through the Representational State Transfer (REST) API. The vulnerability is possible because Splunk App for Splunk O11y Cloud does not neutralize user-supplied SignalFlow content before writing it to the app log.\n\nSplunk Enterprise versions 9.4.x are not affected."
          }
        ],
        "id": "CVE-2026-76267",
        "lastModified": "2026-10-07T21:17:17.467",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "psirt@cisco.com",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-10-07T21:17:17.467",
        "references": [
          {
            "source": "psirt@cisco.com",
            "url": "https://advisory.splunk.com/advisories/SVD-2026-1001"
          }
        ],
        "sourceIdentifier": "psirt@cisco.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-117"
              }
            ],
            "source": "psirt@cisco.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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.