EUVD-2026-36133
GHSA-r5fr-9gmv-jggh
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Single unauthenticated HTTP GET to a default-exposed SCIM endpoint crashes the daemon, giving AV:N/AC:L/PR:N/UI:N with only availability impact (A:H), no confidentiality or integrity loss, scope unchanged.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Unauthenticated remote denial-of-service in Kanidm identity management server versions prior to 1.9.3 allows any network attacker to crash the entire kanidmd daemon by sending a single GET request to any /scim/v1/* endpoint with a deeply nested parenthesised ?filter= query string. The recursive-descent PEG parser exhausts the worker thread's 2 MiB stack, triggering Rust's std::process::abort(). …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions - remote unauthenticated exploitation against default configurations of Kanidm versions <= 1.9.2 whose /scim/v1/* HTTP endpoints are reachable by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H) accurately captures the threat: remote, unauthenticated, low-complexity, with high availability impact and no confidentiality or integrity loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker on the Internet sends a single HTTP GET to https://kanidm.example.com/scim/v1/Entry?filter=((((((... (a few thousand opening parentheses, total URI ~8 KB). … |
| Remediation | Vendor-released patch: upgrade kanidmd and the scim_proto / kanidm_proto crates to 1.9.3 or later, which adds a depth bound to the PEG grammar (see https://github.com/kanidm/kanidm/releases/tag/v1.9.3 and advisory GHSA-r5fr-9gmv-jggh). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Kanidm deployments and identify versions in use; implement firewall restrictions on /scim/v1/* endpoints if immediate patching is not feasible. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Share
External POC / Exploit Code
Leaving vuln.today