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CVE-2026-46689

Kanidm: Unauthenticated process abort via SCIM filter stack exhaustion PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
kanidm / kanidmaffected < 1.9.3

CWE

CWE-248, CWE-400, CWE-674

References

ADP enrichment

CISA-ADP

No English description supplied.