{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal 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 real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-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 the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-56424", "tracking": { "current_release_date": "2026-06-29T08:10:12.446486Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-56424", "initial_release_date": "2026-06-22T14:39:46.961782Z", "revision_history": [ { "date": "2026-06-22T14:39:46.961782Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (5).| CWES updated (1)." }, { "date": "2026-06-22T14:39:48.936133Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-06-22T15:35:05.661305Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-06-23T04:05:46.682649Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)." }, { "date": "2026-06-23T04:05:55.588671Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-06-23T09:05:47.046577Z", "number": "6", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (9)." }, { "date": "2026-06-23T09:05:49.736700Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-06-23T14:53:46.368660Z", "number": "8", "summary": "Unknown change." }, { "date": "2026-06-23T14:53:48.268514Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-06-23T15:36:33.606205Z", "number": "10", "summary": "CVSS created.| Products connected (1).| Product Identifiers created (1)." }, { "date": "2026-06-23T15:36:35.926660Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-06-23T16:27:42.762071Z", "number": "12", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-06-23T16:27:44.407913Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-06-29T08:09:57.769205Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-06-29T08:10:07.028061Z", "number": "15", "summary": "NCSC Score updated." } ], "status": "interim", "version": "15" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.5.42", "product": { "name": "vers:unknown/<2.5.42", "product_id": "CSAFPID-8489460", "product_identification_helper": { "cpe": "cpe:2.3:a:misp-project:misp:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "MISP" }, { "branches": [ { "category": "product_version_range", "name": "vers:semver/<=2.5.41", "product": { "name": "vers:semver/<=2.5.41", "product_id": "CSAFPID-8484457" } } ], "category": "product_name", "name": "misp" } ], "category": "vendor", "name": "MISP" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.5.42", "product": { "name": "vers:unknown/<2.5.42", "product_id": "CSAFPID-8488447" } } ], "category": "product_name", "name": "MISP" } ], "category": "vendor", "name": "Open Source" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-56424", "cwe": { "id": "CWE-639", "name": "Authorization Bypass Through User-Controlled Key" }, "notes": [ { "category": "description", "text": "MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.\n\n\nThe affected paths included:\n\n * Event Reports tag removal: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report\n\n\n\n\n * Collection Elements bulk deletion: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.\n * Analyst Data capture/update: nested analyst data updates could overwrite an existing record without applying the normal canEditAnalystData ownership check, enabling cross-organization overwrite of analyst data records.\n * Template Elements editing: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.\n * Decaying Model editing and mappings: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization. \n\n\n\n\n\n\n\n\nSuccessful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/56xxx/CVE-2026-56424.json" }, { "category": "description", "text": "MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.\n\n\nThe affected paths included:\n\n * Event Reports tag removal: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report\n\n\n\n\n * Collection Elements bulk deletion: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.\n * Analyst Data capture/update: nested analyst data updates could overwrite an existing record without applying the normal canEditAnalystData ownership check, enabling cross-organization overwrite of analyst data records.\n * Template Elements editing: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.\n * Decaying Model editing and mappings: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization. \n\n\n\n\n\n\n\n\nSuccessful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56424" }, { "category": "other", "text": "0.00313", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:N/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "7.1", "title": "CVSSV4 base score" }, { "category": "other", "text": "6.5", "title": "NCSC Score" }, { "category": "other", "text": "The value of the most recent EPSS score, There is product data available from source Certbundde, There is product data available from source Nvd, The value of the mean historic EPSS score", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-8484457", "CSAFPID-8488447", "CSAFPID-8489460" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/56xxx/CVE-2026-56424.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56424" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2035.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0213" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/MISP/MISP/commit/24d7e91339a3ef043652dd5799c36e5065b2bb4a" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/MISP/MISP/commit/57ad774d21bd1863d060a9e6e73ae54eb96784ce" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/MISP/MISP/commit/3aecc04d5816189412b589cf590c6dbe9a8db5c0" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/MISP/MISP/commit/ba2f51fe7440ba2c6043ccde858cac1e25f96931" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/MISP/MISP/commit/744005cefdc3b943bd29669c3b34cc66a5fc2154" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2035.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2035" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/MISP/MISP/releases/tag/v2.5.42" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-834x-pvxg-xh58" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-7v9f-64q7-x2jg" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-ch28-mjgc-m4wr" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-r3v6-qw6x-wf6h" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-3vhv-jx5j-gj6p" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-MF7V-X7R6-FQ57" } ], "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-8484457", "CSAFPID-8488447", "CSAFPID-8489460" ] } ], "title": "CVE-2026-56424" } ] }