CVE-2026-74046

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). 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
Elevated
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 4.9Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Wazuh 4.4.0 before 4.14.7 contains a denial of service vulnerability in the fdecompress_files() function within cluster.py that allows authenticated cluster peers to exhaust memory by supplying a malicious synchronization archive without decompressed size limits. Attackers holding a valid cluster Fernet key can upload a small, highly compressed zip bomb archive that forces wazuh-clusterd on the master node to decompress the full payload into memory, causing memory exhaustion and service disruption.

CVSS v3
4.9
EG Score
4.9MEDIUMmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity49% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github.
generic

Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb
github_pr Patch Available

Bound decompressed size when processing sync archives

Patch available: wazuh/wazuh v5.0.0-beta3 (PR #37119 merged 2026-06-25)

https://github.com/wazuh/wazuh/pull/37119
githubMentions a patch (unverified)🟡 PoC Available

zlib decompression bomb in cluster archive processing lets authenticated peer exhaust wazuh-clusterd memory · Advisory · wazuh/wazuh · GitHub

https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 48× 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. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
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  5. 2026-10-06 13:09 UTCEG score recompute
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  1. 2026-09-23 20:19 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-22 20:25 UTCEG score recompute
  4. 2026-09-21 21:09 UTCEPSS rescore
  5. 2026-09-21 18:20 UTCEG score recompute
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  9. 2026-09-18 19:28 UTCEPSS rescore
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  17. 2026-09-14 11:33 UTCEG score recompute
  18. 2026-09-13 13:07 UTCEG score recompute
  19. 2026-09-12 15:02 UTCEPSS rescore
  20. 2026-09-11 16:15 UTCEG score recompute
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-10 17:46 UTCEG score recompute
  23. 2026-09-10 09:35 UTCEPSS rescore
  24. 2026-09-09 19:20 UTCEG score recompute
  25. 2026-09-08 22:01 UTCEPSS rescore
  26. 2026-09-07 16:08 UTCEG score recompute
  27. 2026-09-06 15:56 UTCEG score recompute
  28. 2026-09-06 13:48 UTCEPSS rescore
  29. 2026-09-05 17:29 UTCEG score recompute
  30. 2026-09-04 19:01 UTCEG score recompute
  31. 2026-09-04 05:07 UTCEPSS rescore
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  35. 2026-09-01 13:54 UTCEPSS rescore
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  38. 2026-08-31 01:26 UTCEG score recompute
  39. 2026-08-30 19:18 UTCEPSS rescore
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  43. 2026-08-29 04:34 UTCEG score recompute
  44. 2026-08-28 21:42 UTCEPSS rescore
  45. 2026-08-28 05:41 UTCEG score recompute
  46. 2026-08-27 14:25 UTCEPSS rescore
  47. 2026-08-27 06:59 UTCEG score recompute
  48. 2026-08-26 14:47 UTCEPSS rescore
  49. 2026-08-26 07:52 UTCEG score recompute
  50. 2026-08-25 13:49 UTCEPSS rescore
  51. 2026-08-25 09:26 UTCEG score recompute
  52. 2026-08-24 14:18 UTCEPSS rescore
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  56. 2026-08-22 14:08 UTCEG score recompute
  57. 2026-08-21 23:49 UTCEPSS rescore
  58. 2026-08-21 15:41 UTCEG score recompute
  59. 2026-08-20 22:56 UTCEPSS rescore
  60. 2026-08-19 18:49 UTCEG score recompute
  61. 2026-08-19 17:04 UTCEPSS rescore
  62. 2026-08-18 20:22 UTCEG score recompute
  63. 2026-08-18 19:29 UTCEG score recompute
  64. 2026-08-18 18:23 UTCEG score recompute
  65. 2026-08-18 17:40 UTCEG score recompute
  66. 2026-08-18 17:39 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-74046?
CVE-2026-74046 is a medium vulnerability published on August 18, 2026. Wazuh 4.4.0 before 4.14.7 contains a denial of service vulnerability in the fdecompress_files() function within cluster.py that allows authenticated cluster peers to exhaust memory by supplying a malicious synchronization archive without decompressed size limits. Attackers holding a valid cluster…
When was CVE-2026-74046 disclosed?
CVE-2026-74046 was first published on August 18, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74046 actively exploited?
CVE-2026-74046 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74046?
CVE-2026-74046 has a CVSS base score of 4.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74046?
A fix for CVE-2026-74046 is available: update to the fixed version the vendor names in its advisory.

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