CVE-2026-76266

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-76266", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2026-08-19T12:02:03.620Z", "datePublished": "2026-10-07T20:46:29.794Z", "dateUpdated": "2026-10-09T03:55:28.884Z"}, "containers": {"cna": {"affected": [{"product": "Splunk Enterprise", "vendor": "Splunk", "versions": [{"version": "10.4", "status": "affected", "versionType": "custom", "lessThan": "10.4.3"}, {"version": "10.2", "status": "affected", "versionType": "custom", "lessThan": "10.2.7"}, {"version": "10.0", "status": "affected", "versionType": "custom", "lessThan": "10.0.10"}, {"version": "9.4", "status": "affected", "versionType": "custom", "lessThan": "9.4.15"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/markdown", "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will."}], "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will."}], "references": [{"url": "https://advisory.splunk.com/advisories/SVD-2026-1001"}], "title": "Local Privilege Escalation through Linux Package Upgrades in Splunk Enterprise", "datePublic": "2026-10-07T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "type": "cwe", "cweId": "CWE-269", "description": "The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor."}]}], "source": {"advisory": "SVD-2026-1001", "discovery": ""}, "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-10-07T20:46:29.794Z"}, "metrics": [{"cvssV3_1": {"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H", "version": "3.1", "baseScore": 7.7, "baseSeverity": "HIGH"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "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": "Use a tar file instead of a Linux package to upgrade Splunk Enterprise. For more information see [Upgrade on UNIX](https://help.splunk.com/en/splunk-enterprise/get-started/install-and-upgrade/10.4/upgrade-or-migrate-splunk-enterprise/upgrade-on-unix) in the Splunk documentation."}], "credits": [{"lang": "en", "value": "Jean-Michel Remi Boudreau", "type": "reporter"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-08T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-76266"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-09T03:55:28.884Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-76266", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-08T18:01:41.971448Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-08T18:01:49.784Z"}}], "cna": {"title": "Local Privilege Escalation through Linux Package Upgrades in Splunk Enterprise", "source": {"advisory": "SVD-2026-1001", "discovery": ""}, "credits": [{"lang": "en", "type": "reporter", "value": "Jean-Michel Remi Boudreau"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "baseScore": 7.7, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Splunk", "product": "Splunk Enterprise", "versions": [{"status": "affected", "version": "10.4", "lessThan": "10.4.3", "versionType": "custom"}, {"status": "affected", "version": "10.2", "lessThan": "10.2.7", "versionType": "custom"}, {"status": "affected", "version": "10.0", "lessThan": "10.0.10", "versionType": "custom"}, {"status": "affected", "version": "9.4", "lessThan": "9.4.15", "versionType": "custom"}]}], "solutions": [{"lang": "en", "value": "Upgrade Splunk Enterprise to versions 10.4.3, 10.2.7, 10.0.10, and 9.4.15, or higher."}], "datePublic": "2026-10-07T00:00:00.000Z", "references": [{"url": "https://advisory.splunk.com/advisories/SVD-2026-1001"}], "workarounds": [{"lang": "en", "value": "Use a tar file instead of a Linux package to upgrade Splunk Enterprise. For more information see [Upgrade on UNIX](https://help.splunk.com/en/splunk-enterprise/get-started/install-and-upgrade/10.4/upgrade-or-migrate-splunk-enterprise/upgrade-on-unix) in the Splunk documentation."}], "descriptions": [{"lang": "en", "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will.", "supportingMedia": [{"type": "text/markdown", "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "cwe", "cweId": "CWE-269", "description": "The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor."}]}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-10-07T20:46:29.794Z"}}}, "cveMetadata": {"cveId": "CVE-2026-76266", "state": "PUBLISHED", "dateUpdated": "2026-10-09T03:55:28.884Z", "dateReserved": "2026-08-19T12:02:03.620Z", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "datePublished": "2026-10-07T20:46:29.794Z", "assignerShortName": "cisco"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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"}, {"lessThan": "9.4.15", "status": "affected", "version": "9.4", "versionType": "custom"}]}], "source": "psirt@cisco.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*", "matchCriteriaId": "A49E689F-BF81-4C8D-953B-13D67B2FCA07", "versionEndExcluding": "9.4.15", "versionStartIncluding": "9.4.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*", "matchCriteriaId": "821853EA-D03C-4017-95A9-3770CE48BE8C", "versionEndExcluding": "10.0.10", "versionStartIncluding": "10.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*", "matchCriteriaId": "37593BC0-5F11-410C-B823-195F5BFAD2BF", "versionEndExcluding": "10.2.7", "versionStartIncluding": "10.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*", "matchCriteriaId": "1268F2CB-E517-45A6-917E-9C1FDBA6CA0A", "versionEndExcluding": "10.4.3", "versionStartIncluding": "10.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will."}], "id": "CVE-2026-76266", "lastModified": "2026-10-14T12:22:06.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.1, "impactScore": 6.0, "source": "psirt@cisco.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-76266", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-08T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-10-07T21:17:17.310", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory", "Mitigation"], "url": "https://advisory.splunk.com/advisories/SVD-2026-1001"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[10.4,10.4.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[10.2,10.2.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[10.0,10.0.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4,9.4.15)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Splunk Enterprise", "source": "cna", "vendor": "Splunk"}, "product": "splunk_enterprise", "vendor": "splunk"}], "created": "2026-10-07T22:45:17.178983+00:00", "updated": "2026-10-07T22:45:17.412410+00:00", "vendors": ["splunk", "splunk$PRODUCT$splunk_enterprise"]}