CVE-2026-46689
Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
10/06/2026
Last modified:
11/06/2026
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 extractor, before any handler body and therefore before any ACL check. This issue has been patched in version 1.9.3.
Impact
Base Score 4.0
8.70
Severity 4.0
HIGH