CVE-2026-56401

✕ Withdrawn — historical dataMEDIUMPre-NVD 6.5Elevated
6.5CVSS
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Wazuh wazuh-modulesd before 5.0.0-beta3 contains a null pointer dereference vulnerability in inventory_sync FlatBuffer DataValue handling. An enrolled agent can send a verifier-valid DataValue message omitting the optional id field, causing wazuh-modulesd to crash when dereferencing data->id()->string_view() without null validation, resulting in denial of service.

CVSS v3
6.5
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
—
EG Risk
—
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

Published

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (3)

Auto-updated Jul 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic

Wazuh - NULL Pointer Dereference in inventory_sync DataValue FlatBuffer Handling | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wazuh-null-pointer-dereference-in-inventory-sync-datavalue-flatbuffer-handling
github Patch Available🟡 PoC Available

NULL dereference in Wazuh inventory_sync FlatBuffer DataValue handling allows enrolled agent to crash wazuh-modulesd · Advisory · wazuh/wazuh · GitHub

https://github.com/wazuh/wazuh/security/advisories/GHSA-6hxp-c9x3-qc7p
github_commit Patch Available

commit 3adf4f879427 (wazuh/wazuh)

Patch available: wazuh/wazuh v5.0.0-beta3 (contains commit 3adf4f879427)

https://github.com/wazuh/wazuh/commit/3adf4f87942705aa0ceeba1e145c259cc9dcd242

Vendor Advisories for CVE-2026-56401(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 2× in last 7d / 5× 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. 2026-09-28 13:25 UTCGHSA enrichment
  2. 2026-09-23 06:12 UTCGHSA enrichment
  3. 2026-09-18 05:45 UTCGHSA enrichment
  4. 2026-09-12 03:37 UTCGHSA enrichment
  5. 2026-09-05 22:49 UTCGHSA enrichment
  6. 2026-08-28 04:30 UTCGHSA enrichment
  7. 2026-08-25 05:15 UTCGHSA enrichment
  8. 2026-08-22 06:05 UTCGHSA enrichment
  9. 2026-08-19 06:54 UTCGHSA enrichment
  10. 2026-08-16 06:53 UTCGHSA enrichment
  11. 2026-08-13 07:43 UTCGHSA enrichment
  12. 2026-08-10 08:32 UTCGHSA enrichment
  13. 2026-08-07 09:22 UTCGHSA enrichment
  14. 2026-08-04 10:12 UTCGHSA enrichment
  15. 2026-08-01 10:52 UTCEG score recompute
  16. 2026-08-01 10:51 UTCGHSA enrichment
  17. 2026-07-29 11:40 UTCGHSA enrichment
  18. 2026-07-26 12:28 UTCEG score recompute
  19. 2026-07-26 12:28 UTCGHSA enrichment
  20. 2026-07-23 03:20 UTCEG score recompute▼ 6.50
  21. 2026-07-16 16:16 UTCGHSA enrichment
  22. 2026-07-15 16:57 UTCEPSS rescore
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 15:58 UTCGHSA enrichment
  25. 2026-07-15 02:00 UTCEPSS rescore
Show 17 more
  1. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-14 15:43 UTCGHSA enrichment
  3. 2026-07-13 22:31 UTCEPSS rescore
  4. 2026-07-13 15:25 UTCGHSA enrichment
  5. 2026-07-13 06:13 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-12 15:10 UTCGHSA enrichment
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-11 14:54 UTCGHSA enrichment
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-10 14:39 UTCGHSA enrichment
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 14:24 UTCGHSA enrichment
  16. 2026-07-08 14:06 UTCEG score recompute
  17. 2026-07-08 14:05 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56401?
CVE-2026-56401 is a medium vulnerability published on July 8, 2026. Wazuh wazuh-modulesd before 5.0.0-beta3 contains a null pointer dereference vulnerability in inventorysync FlatBuffer DataValue handling. An enrolled agent can send a verifier-valid DataValue message omitting the optional id field, causing wazuh-modulesd to crash when dereferencing…
When was CVE-2026-56401 disclosed?
CVE-2026-56401 was first published on July 8, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56401 actively exploited?
CVE-2026-56401 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56401?
CVE-2026-56401 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56401?
A fix for CVE-2026-56401 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56401 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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