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.
History

Thu, 11 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 11 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Kanidm
Kanidm kanidm
Vendors & Products Kanidm
Kanidm kanidm

Wed, 10 Jun 2026 21:00:00 +0000

Type Values Removed Values Added
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.
Title Kanidm: Unauthenticated process abort via SCIM filter stack exhaustion
Weaknesses CWE-248
CWE-400
CWE-674
References
Metrics cvssV4_0

{'score': 8.7, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-10T20:28:44.009Z

Updated: 2026-06-11T12:55:59.122Z

Reserved: 2026-05-15T21:46:51.548Z

Link: CVE-2026-46689

cve-icon Vulnrichment

Updated: 2026-06-11T12:55:43.226Z

cve-icon NVD

Status : Deferred

Published: 2026-06-10T22:17:00.443

Modified: 2026-06-11T15:36:29.197

Link: CVE-2026-46689

cve-icon Redhat

No data.