{"id":"CVE-2026-55551","aliases":[],"cve":{"records":[{"id":"CVE-2026-55551","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-06-16T23:01:04.075Z","published":"2026-10-30T16:48:51.352Z","modified":"2026-10-30T16:48:51.352Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-30T16:48:51.352Z"}],"references":[{"url":"https://github.com/infonl/dimpact-zaakafhandelcomponent/security/advisories/GHSA-cv9m-35q4-cxfm","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/infonl/dimpact-zaakafhandelcomponent/pull/6225","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/infonl/dimpact-zaakafhandelcomponent/pull/6229","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/infonl/dimpact-zaakafhandelcomponent/commit/7b90586be658cec9fa5c98c0838636237f40931f","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/infonl/dimpact-zaakafhandelcomponent/commit/d050f247301a1bcfb867015725a693c540a06f5a","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/infonl/dimpact-zaakafhandelcomponent/releases/tag/v5.2.0","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-285","description":"CWE-285: Improper Authorization","source":"GitHub_M"},{"id":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","source":"GitHub_M"}],"applicability":[],"prioritization":[]},"title":"ZAC: Missing per-zaaktype authorization on by-ID decision and process reads","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"ZAC is an open-source, workflow-based Common Ground component for Dutch municipal case management. Prior to 5.2.0, by-id read endpoints in `src/main/kotlin/nl/info/zac/app/zaak/ZaakRestService.kt` omit `assertPolicy`(`policyService.readZaakRechten(zaak).lezen`) authorization. `RequestAuthorizationFilter` and `hasAnyApplicationRole` require only an application role on any zaaktype, not the target case's type, while `zaak-rechten.rego` enforces the actual `zaaktype_allowed` boundary only when invoked. An authenticated low-privileged municipal user who knows a case or decision UUID can use `GET /rest/zaken/besluit/zaakUuid/{uuid}` (`listBesluitenForZaakUUID`) to read decisions including types, dates, and free-text toelichting; `GET /rest/zaken/besluit/{uuid}/historie` (`listBesluitHistorie`) to read audit old/new values; and `GET /rest/zaken/{uuid}/process-diagram` (`downloadProcessDiagram`) to read BPMN workflow state across unauthorized zaaktypes. The advisory also identifies `zaak/{uuid}/afzender` (`listAfzendersVoorZaak`) as exposing zaaktype mailbox configuration without a policy check. The search/_zoek path is correctly authorization-filtered and is not part of this by-id read cluster. This issue is fixed in version 5.2.0.","score":6.5,"severity":"medium","published":"2026-10-30T16:48:51.352Z","modified":"2026-10-30T16:48:51.352Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"infonl","name":"dimpact-zaakafhandelcomponent","platforms":[],"versions":[{"version":"< 5.2.0","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-55551"}],"remediation":[],"references":["https://github.com/infonl/dimpact-zaakafhandelcomponent/security/advisories/GHSA-cv9m-35q4-cxfm","https://github.com/infonl/dimpact-zaakafhandelcomponent/pull/6225","https://github.com/infonl/dimpact-zaakafhandelcomponent/pull/6229","https://github.com/infonl/dimpact-zaakafhandelcomponent/commit/7b90586be658cec9fa5c98c0838636237f40931f","https://github.com/infonl/dimpact-zaakafhandelcomponent/commit/d050f247301a1bcfb867015725a693c540a06f5a","https://github.com/infonl/dimpact-zaakafhandelcomponent/releases/tag/v5.2.0"],"sources":[{"name":"CVE","id":"CVE-2026-55551","modified":"2026-10-30T16:48:51.352Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-55551"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5}],"sourceAffected":[],"observedAt":"2026-10-30T18:16:25.896Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T04:20:32.721Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T18:25:33.741Z","attemptedAt":"2026-10-30T18:25:33.741Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T18:25:33.813Z","attemptedAt":"2026-10-30T18:25:33.813Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T18:25:33.895Z","attemptedAt":"2026-10-30T18:25:33.895Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T18:25:33.066Z","attemptedAt":"2026-10-30T18:25:33.066Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-55551","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55551","modified":"2026-10-30T17:17:25.647","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","checkedAt":"2026-10-30T18:25:33.741Z"},{"source":"ENISA EUVD","id":"EUVD-2026-114196","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114196","modified":"Oct 30, 2026, 4:48:51 PM","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","checkedAt":"2026-10-30T18:25:33.895Z"}],"aiSummary":null}