CVE-2026-46689

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
23.5%
KEV
Not listed

Published

May 6, 2026

Last Modified

June 11, 2026

Advisory Details (2)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

Unauthenticated process abort via SCIM filter stack exhaustion · Advisory · kanidm/kanidm · GitHub

https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh
github_release Patch Available

v1.9.3

Patch available: kanidm/kanidm v1.9.3

https://github.com/kanidm/kanidm/releases/tag/v1.9.3

Vendor Advisories for CVE-2026-46689(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
crates.io(2)
PackageVulnerable rangeFixed inDependents
kanidm_proto—1.9.3—
scim_proto—1.9.3—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-08 15:16 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 02:30 UTCEPSS rescore
  5. 2026-07-04 06:31 UTCEPSS rescore
  6. 2026-07-01 15:07 UTCEPSS rescore
  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-29 14:06 UTCEPSS rescore
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-28 04:56 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-27 14:44 UTCEG score recompute
  14. 2026-06-27 03:08 UTCEPSS rescore
  15. 2026-06-26 23:04 UTCEG score recompute
  16. 2026-06-25 13:49 UTCEPSS rescore
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-23 21:33 UTCEPSS rescore
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 14:56 UTCEPSS rescore
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-21 01:59 UTCEPSS rescore
Show 21 more
  1. 2026-06-19 19:26 UTCEPSS rescore
  2. 2026-06-19 19:26 UTCEPSS rescore
  3. 2026-06-18 17:52 UTCEPSS rescore
  4. 2026-06-18 17:52 UTCEPSS rescore
  5. 2026-06-17 17:53 UTCEPSS rescore
  6. 2026-06-16 17:53 UTCEPSS rescore
  7. 2026-06-15 17:49 UTCEPSS rescore
  8. 2026-06-15 06:22 UTCEG score recompute
  9. 2026-06-14 18:41 UTCEG score recompute
  10. 2026-06-14 07:12 UTCEG score recompute
  11. 2026-06-13 23:00 UTCEPSS rescore
  12. 2026-06-12 23:12 UTCEPSS rescore
  13. 2026-06-12 23:12 UTCEPSS rescore
  14. 2026-06-12 22:09 UTCEG score recompute
  15. 2026-06-12 09:43 UTCEG score recompute
  16. 2026-06-11 22:01 UTCEG score recompute
  17. 2026-06-11 14:00 UTCEPSS rescore
  18. 2026-06-11 10:31 UTCEG score recompute
  19. 2026-06-10 23:01 UTCEG score recompute▲ 8.70
  20. 2026-06-10 23:00 UTCNVD updateCVSS v3 → 8.7 · CVSS v4 → 8.7
  21. 2026-05-24 06:19 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-46689?
CVE-2026-46689 is a high vulnerability published on May 6, 2026. 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…
When was CVE-2026-46689 disclosed?
CVE-2026-46689 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46689 actively exploited?
CVE-2026-46689 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46689?
CVE-2026-46689 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-46689?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46689, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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