{ "document": { "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "nl", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." }, { "category": "description", "text": "Splunk heeft meerdere kwetsbaarheden verholpen in Splunk Enterprise en Splunk Cloud Platform.", "title": "Feiten" }, { "category": "description", "text": "De kwetsbaarheden betreffen verschillende onderdelen van Splunk Enterprise en Splunk Cloud Platform. Splunk heeft de kwetsbaarheid met kenmerk CVE-2026-20253 in de PostgreSQL sidecar service endpoint als kritiek beoordeeld en maakt het mogelijk voor niet-geauthenticeerde gebruikers om willekeurige bestanden aan te maken of te verwijderen door het ontbreken van authenticatiecontroles. \nEen andere kwetsbaarheid met kenmerk CVE-2026-20251 betreft een Remote Code Execution (RCE) via onveilige deserialisatie van KV Store data met de 'jsonpickle' Python library, waarbij laaggeprivilegieerde gebruikers zonder admin- of power-rollen code op afstand kunnen uitvoeren. \nVerder zijn meerdere kwetsbaarheden vastgesteld die het mogelijk maken om gevoelige gegevens te exfiltreren via onder meer SSRF-, CSS-injectie- en XSS-aanvallen. Door onvoldoende validatie van URL’s, domeinen en gebruikersinvoer kunnen aanvallers beveiligingscontroles omzeilen, interne systemen benaderen en data buitmaken.\n\nUpdate: Het Splunk Product Security Incident Response Team (PSIRT) meldt dat beperkt en gericht misbruik is waargenomen van de kwetsbaarheid met kenmerk CVE-2026-20253. De kwetsbaarheid maakt het voor een kwaadwillende mogelijk om bestanden aan te maken of verwijderen en zo de werking van het systeem te verstoren. Voor zover bekend is uitvoer van code niet mogelijk.", "title": "Interpretaties" }, { "category": "description", "text": "Splunk heeft updates uitgebracht om de kwetsbaarheden in Splunk Enterprise en Splunk Cloud Platform te verhelpen. Zie bijgevoegde referenties voor meer informatie.", "title": "Oplossingen" }, { "category": "general", "text": "medium", "title": "Kans" }, { "category": "general", "text": "high", "title": "Schade" }, { "category": "general", "text": "Improper Input Validation", "title": "CWE-20" }, { "category": "general", "text": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "title": "CWE-79" }, { "category": "general", "text": "Improper Access Control", "title": "CWE-284" }, { "category": "general", "text": "Missing Authentication for Critical Function", "title": "CWE-306" }, { "category": "general", "text": "Deserialization of Untrusted Data", "title": "CWE-502" }, { "category": "general", "text": "Server-Side Request Forgery (SSRF)", "title": "CWE-918" } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "Nationaal Cyber Security Centrum", "namespace": "https://www.ncsc.nl/" }, "references": [ { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0601" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0602" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0603" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0604" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0605" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0606" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0607" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0608" }, { "category": "external", "summary": "Reference", "url": "https://advisory.splunk.com/advisories/SVD-2026-0609" } ], "title": "Kwetsbaarheden verholpen in Splunk Enterprise en Splunk Cloud Platform", "tracking": { "current_release_date": "2026-06-19T12:42:32.008453Z", "generator": { "date": "2025-08-04T16:30:00Z", "engine": { "name": "V.A.", "version": "1.3" } }, "id": "NCSC-2026-0198", "initial_release_date": "2026-06-15T08:27:12.211234Z", "revision_history": [ { "date": "2026-06-15T08:27:12.211234Z", "number": "1.0.0", "summary": "Initiele versie" }, { "date": "2026-06-19T12:42:32.008453Z", "number": "1.0.1", "summary": "Er is actief misbruik waargenomen van CVE-2026-20253 door Splunk Product Security Incident Response Team (PSIRT) in juni. " } ], "status": "final", "version": "1.0.1" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-1" } } ], "category": "product_name", "name": "Splunk Cloud Platform" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-2" } } ], "category": "product_name", "name": "Splunk Enterprise" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-3" } } ], "category": "product_name", "name": "Splunk Secure Gateway" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-4" } } ], "category": "product_name", "name": "splunk" } ], "category": "vendor", "name": "Splunk" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-20253", "cwe": { "id": "CWE-306", "name": "Missing Authentication for Critical Function" }, "notes": [ { "category": "other", "text": "Missing Authentication for Critical Function", "title": "CWE-306" }, { "category": "description", "text": "Splunk Enterprise and Splunk Cloud Platform versions prior to 10.2.4 and 10.4.2604.3 respectively have a vulnerability in an unauthenticated PostgreSQL sidecar service endpoint allowing arbitrary file creation or truncation by unauthenticated users.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20253 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20253.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20253" }, { "cve": "CVE-2026-20251", "cwe": { "id": "CWE-502", "name": "Deserialization of Untrusted Data" }, "notes": [ { "category": "other", "text": "Deserialization of Untrusted Data", "title": "CWE-502" }, { "category": "description", "text": "A Remote Code Execution vulnerability in Splunk Enterprise, Splunk Cloud Platform, and Splunk Secure Gateway allows low-privileged users to execute arbitrary code via unsafe deserialization of KV Store data using the 'jsonpickle' Python library.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20251 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20251.json" } ], "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" ] } ], "title": "CVE-2026-20251" }, { "cve": "CVE-2026-20252", "cwe": { "id": "CWE-918", "name": "Server-Side Request Forgery (SSRF)" }, "notes": [ { "category": "other", "text": "Server-Side Request Forgery (SSRF)", "title": "CWE-918" }, { "category": "description", "text": "A vulnerability in Splunk Enterprise and Splunk Cloud Platform allows low-privileged users to perform server-side request forgery via the Dashboard Studio PDF export feature due to improper trusted-domain validation and HTTP redirect handling.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20252 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20252.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L", "baseScore": 7.6, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20252" }, { "cve": "CVE-2026-20254", "notes": [ { "category": "description", "text": "Certain versions of Splunk Enterprise and Splunk Cloud Platform contain a CSS injection vulnerability in classic dashboards that allows low-privileged users to exfiltrate sensitive data via insufficient Trusted Domains validation.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20254 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20254.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.7, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20254" }, { "cve": "CVE-2026-20255", "notes": [ { "category": "description", "text": "A vulnerability in Splunk Enterprise and Splunk Cloud Platform allows low-privileged users to create malicious classic dashboards that can exfiltrate sensitive data due to incomplete URL validation in the external content dialog.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20255 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20255.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.7, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20255" }, { "cve": "CVE-2026-20256", "notes": [ { "category": "description", "text": "A vulnerability in certain versions of Splunk Enterprise and Splunk Cloud Platform enables low-privileged users to exfiltrate data by exploiting protocol-relative URLs in classic dashboard drill-down links, bypassing URL validation and external navigation warnings.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20256 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20256.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.7, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20256" }, { "cve": "CVE-2026-20257", "notes": [ { "category": "description", "text": "A vulnerability in Splunk Enterprise and Splunk Cloud Platform allows low-privileged users to exfiltrate sensitive data from higher-privileged browsers via crafted dashboards exploiting insufficient style attribute validation, requiring phishing to execute.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20257 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20257.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.7, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20257" }, { "cve": "CVE-2026-20259", "notes": [ { "category": "description", "text": "Certain versions of Splunk Enterprise and Splunk Cloud Platform contain an access control flaw allowing users with the `edit_saved_search_owner` capability to improperly reassign saved search ownership beyond their authorized scope.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20259 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20259.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20259" }, { "cve": "CVE-2026-20258", "cwe": { "id": "CWE-79", "name": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')" }, "notes": [ { "category": "other", "text": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "title": "CWE-79" }, { "category": "description", "text": "A vulnerability in certain versions of Splunk Enterprise and Splunk Cloud Platform allows low-privileged users to execute unauthorized JavaScript code in another user's browser via malicious content in classic dashboard HTML panels.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-20258 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20258.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4" ] } ], "title": "CVE-2026-20258" } ] }