{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-20251: Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-20251","status":"final","version":"1","initial_release_date":"2026-06-10T17:16:00.352Z","current_release_date":"2026-06-11T03:55:39.372Z","revision_history":[{"date":"2026-06-10T17:16:00.352Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, Splunk Cloud Platform versions below 10.3.2512.12, 10.2.2510.14, 10.1.2507.22, and 9.3.2411.132, and Splunk Secure Gateway versions below 3.10.6, 3.9.20, and 3.8.67, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could perform a Remote Code Execution (RCE) through the Splunk Secure Gateway app.<br><br>The Remote Code Execution is possible because of unsafe deserialization of App Key Value Store (KV Store) data through the ‘jsonpickle’ Python library, which reconstructs arbitrary Python objects from specially crafted JavaScript Object Notation (JSON) without adequate validation.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-20251 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-20251"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-20251"},{"category":"external","summary":"advisory.splunk.com","url":"https://advisory.splunk.com/advisories/SVD-2026-0601"}]},"product_tree":{"branches":[{"category":"vendor","name":"Splunk","branches":[{"category":"product_name","name":"Splunk Enterprise","branches":[{"category":"product_version_range","name":">=10.2 <10.2.4","product":{"name":"Splunk Splunk Enterprise >=10.2 <10.2.4","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_enterprise:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=10.0 <10.0.7","product":{"name":"Splunk Splunk Enterprise >=10.0 <10.0.7","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_enterprise:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9.4 <9.4.12","product":{"name":"Splunk Splunk Enterprise >=9.4 <9.4.12","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_enterprise:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9.3 <9.3.13","product":{"name":"Splunk Splunk Enterprise >=9.3 <9.3.13","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_enterprise:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Splunk","branches":[{"category":"product_name","name":"Splunk Cloud Platform","branches":[{"category":"product_version_range","name":">=10.3.2512 <10.3.2512.12","product":{"name":"Splunk Splunk Cloud Platform >=10.3.2512 <10.3.2512.12","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=10.2.2510 <10.2.2510.14","product":{"name":"Splunk Splunk Cloud Platform >=10.2.2510 <10.2.2510.14","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=10.1.2507 <10.1.2507.22","product":{"name":"Splunk Splunk Cloud Platform >=10.1.2507 <10.1.2507.22","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9.3.2411 <9.3.2411.132","product":{"name":"Splunk Splunk Cloud Platform >=9.3.2411 <9.3.2411.132","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Splunk","branches":[{"category":"product_name","name":"Splunk Secure Gateway","branches":[{"category":"product_version_range","name":">=3.10 <3.10.6","product":{"name":"Splunk Splunk Secure Gateway >=3.10 <3.10.6","product_id":"CSAFPID-9","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=3.9 <3.9.20","product":{"name":"Splunk Splunk Secure Gateway >=3.9 <3.9.20","product_id":"CSAFPID-10","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=3.8 <3.8.67","product":{"name":"Splunk Splunk Secure Gateway >=3.8 <3.8.67","product_id":"CSAFPID-11","product_identification_helper":{"cpe":"cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-20251","title":"Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway","notes":[{"category":"description","text":"In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, Splunk Cloud Platform versions below 10.3.2512.12, 10.2.2510.14, 10.1.2507.22, and 9.3.2411.132, and Splunk Secure Gateway versions below 3.10.6, 3.9.20, and 3.8.67, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could perform a Remote Code Execution (RCE) through the Splunk Secure Gateway app.<br><br>The Remote Code Execution is possible because of unsafe deserialization of App Key Value Store (KV Store) data through the ‘jsonpickle’ Python library, which reconstructs arbitrary Python objects from specially crafted JavaScript Object Notation (JSON) without adequate validation.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 3.8.67, 3.9.20, 3.10.6, 9.3.13, 9.3.2411.132, 9.4.12, 10.0.7, 10.1.2507.22, 10.2.4, 10.2.2510.14, 10.3.2512.12.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11"]}]}]}