Kanidm up to 1.9.2 PEG Parser /scim/v1 std::process::abort uncaught exception

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Kanidm up to 1.9.2. This affects the function std::process::abort of the file /scim/v1 of the component PEG Parser. Such manipulation leads to uncaught exception. This vulnerability is listed as CVE-2026-46689. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Kanidm up to 1.9.2 and classified as problematic. Affected by this issue is the function std::process::abort of the file /scim/v1 of the component PEG Parser. The manipulation with an unknown input leads to a uncaught exception vulnerability. Using CWE to declare the problem leads to CWE-248. An exception is thrown from a function, but it is not caught. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-46689 since 05/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 1.9.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uncaught exception
CWE: CWE-248
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kanidm 1.9.3

Timelineinfo

05/15/2026 CVE reserved
06/11/2026 +27 days Advisory disclosed
06/11/2026 +0 days VulDB entry created
06/11/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-r5fr-9gmv-jggh
Status: Confirmed

CVE: CVE-2026-46689 (🔒)
GCVE (CVE): GCVE-0-2026-46689
GCVE (VulDB): GCVE-100-370328

Entryinfo

Created: 06/11/2026 08:04
Changes: 06/11/2026 08:04 (69)
Complete: 🔍
Cache ID: 216::103

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