{"id":"CVE-2026-76271","state":"PUBLISHED","title":"Denial of Service (DoS) in the Discover Splunk Observability Cloud app for Splunk Enterprise","description":"In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a low-privileged user that does not hold the \"admin\" or \"power\" Splunk roles could cause a denial of service against a Representational State Transfer (REST) API endpoint in the Discover Splunk Observability Cloud app. The vulnerability is possible because the app uses an inefficient regular expression to validate input submitted through the endpoint. For more information see About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access), Splunk Observability Cloud previews (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/observability/splunk-observability-cloud-previews), and restmap.conf (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/configuration-file-reference/10.4.0-configuration-file-reference/restmap.conf) in the Splunk documentation.\n\nSplunk Enterprise versions 9.4.x are not affected.","publishedAt":"2026-10-07T20:46:32.886Z","updatedAt":"2026-10-08T18:01:28.447Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"cisco"},"assigner":"cisco","products":["Splunk Splunk Enterprise"],"affected":[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.4","status":"affected","lessThan":"10.4.3","versionType":"custom"},{"version":"10.2","status":"affected","lessThan":"10.2.7","versionType":"custom"},{"version":"10.0","status":"affected","lessThan":"10.0.10","versionType":"custom"}],"modules":["REST API"]}],"references":["https://advisory.splunk.com/advisories/SVD-2026-1001"],"weaknesses":["CWE-407"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/76xxx/CVE-2026-76271.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-76271","state":"PUBLISHED","datePublished":"2026-10-07T20:46:32.886Z","dateUpdated":"2026-10-08T18:01:28.447Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2026-08-19T12:02:03.620Z"},"containers":{"cna":{"title":"Denial of Service (DoS) in the Discover Splunk Observability Cloud app for Splunk Enterprise","descriptions":[{"lang":"en","value":"In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a low-privileged user that does not hold the \"admin\" or \"power\" Splunk roles could cause a denial of service against a Representational State Transfer (REST) API endpoint in the Discover Splunk Observability Cloud app. The vulnerability is possible because the app uses an inefficient regular expression to validate input submitted through the endpoint. For more information see About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access), Splunk Observability Cloud previews (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/observability/splunk-observability-cloud-previews), and restmap.conf (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/configuration-file-reference/10.4.0-configuration-file-reference/restmap.conf) in the Splunk documentation.\n\nSplunk Enterprise versions 9.4.x are not affected."}],"affected":[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.4","status":"affected","lessThan":"10.4.3","versionType":"custom"},{"version":"10.2","status":"affected","lessThan":"10.2.7","versionType":"custom"},{"version":"10.0","status":"affected","lessThan":"10.0.10","versionType":"custom"}],"modules":["REST API"]}],"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-1001"}],"metrics":[{"cvssV3_1":{"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1","baseScore":6.5,"baseSeverity":"MEDIUM"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-407","lang":"en","type":"cwe","description":"An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached."}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2026-10-07T20:46:32.886Z"},"datePublic":"2026-10-07T00:00:00.000Z","source":{"advisory":"SVD-2026-1001","discovery":"INTERNAL"},"solutions":[{"lang":"en","value":"Upgrade Splunk Enterprise to versions 10.4.3, 10.2.7, 10.0.10, and 9.4.15, or higher."}],"workarounds":[{"lang":"en","value":"Turn off or remove the Discover Splunk Observability Cloud app. 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."}],"credits":[{"lang":"en","value":"Gabriel Nitu, Splunk","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-08T18:01:15.297829Z","id":"CVE-2026-76271","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-08T18:01:28.447Z"}}]}}}