{"id":"CVE-2026-46689","state":"PUBLISHED","title":"Kanidm: Unauthenticated process abort via SCIM filter stack exhaustion","description":"Kanidm is an identity management platform. Prior to version 1.9.3, a single unauthenticated GET to any /scim/v1/... endpoint with a ?filter= query string of a few thousand nested parentheses (≈ 4–12 KB) drives the recursive-descent PEG parser past the worker thread's stack guard page. Rust responds to stack overflow with std::process::abort() — the entire kanidmd process exits. The parse runs inside axum's Query<ScimEntryGetQuery> extractor, before any handler body and therefore before any ACL check. This issue has been patched in version 1.9.3.","publishedAt":"2026-06-10T20:28:44.009Z","updatedAt":"2026-06-11T12:55:59.122Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["kanidm kanidm"],"affected":[{"vendor":"kanidm","product":"kanidm","versions":[{"version":"< 1.9.3","status":"affected"}]}],"references":["https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh","https://github.com/kanidm/kanidm/releases/tag/v1.9.3"],"weaknesses":["CWE-248","CWE-400","CWE-674"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46689.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46689","state":"PUBLISHED","datePublished":"2026-06-10T20:28:44.009Z","dateUpdated":"2026-06-11T12:55:59.122Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-15T21:46:51.548Z"},"containers":{"cna":{"title":"Kanidm: Unauthenticated process abort via SCIM filter stack exhaustion","descriptions":[{"lang":"en","value":"Kanidm is an identity management platform. Prior to version 1.9.3, a single unauthenticated GET to any /scim/v1/... endpoint with a ?filter= query string of a few thousand nested parentheses (≈ 4–12 KB) drives the recursive-descent PEG parser past the worker thread's stack guard page. Rust responds to stack overflow with std::process::abort() — the entire kanidmd process exits. The parse runs inside axum's Query<ScimEntryGetQuery> extractor, before any handler body and therefore before any ACL check. This issue has been patched in version 1.9.3."}],"affected":[{"vendor":"kanidm","product":"kanidm","versions":[{"version":"< 1.9.3","status":"affected"}]}],"references":[{"url":"https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh","name":"https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/kanidm/kanidm/releases/tag/v1.9.3","name":"https://github.com/kanidm/kanidm/releases/tag/v1.9.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-248","lang":"en","description":"CWE-248: Uncaught Exception","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-674","lang":"en","description":"CWE-674: Uncontrolled Recursion","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-10T20:28:44.009Z"},"source":{"advisory":"GHSA-r5fr-9gmv-jggh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-11T12:55:52.379516Z","id":"CVE-2026-46689","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-11T12:55:59.122Z"}}]}}}