CVE-2026-46689 Details
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.
A denial-of-service vulnerability has been identified in Kanidm, an identity management platform, in versions prior to 1.9.3. The issue arises from the SCIM filter parsing, which lacks a depth limit, allowing for stack exhaustion. An unauthenticated GET request to any '/scim/v1/...' endpoint, with a filter query containing a few thousand nested parentheses, can cause the server to crash. This vulnerability exploits the recursive nature of the filter grammar, which processes parentheses without depth restrictions, leading to a stack overflow that terminates the Kanidm process.
Users can upgrade to Kanidm version 1.9.3 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 10, 2026CISA-ADP
Assessed Jun 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/kanidm/kanidm/releases/tag/v1.9.3 | [email protected] | Release NotesVendor |
| https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-248 | Uncaught Exception | [email protected] |
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
| CWE-674 | Uncontrolled Recursion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Kanidm | >= 1.7.0, < 1.9.3 (semver) |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 11, 2026 | CVE Modified | CISA-ADP |
| Jun 10, 2026 | New CVE Received | [email protected] |