CVE-2026-45798

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.9% (58th 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.9%
EPSS %ILE
58th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 19, 2026

Last Modified

September 15, 2026

Advisory Details (5)

Auto-updated Aug 19, 2026
Patch available. Sources: github_release, github, github_pr, github_commit.
github_release Patch Available

Wazuh v5.0.0 Beta 2

Patch available: wazuh/wazuh v5.0.0-beta2 (pre-release)

https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2
github_release Patch Available

Wazuh v4.14.6

Patch available: wazuh/wazuh v4.14.6

https://github.com/wazuh/wazuh/releases/tag/v4.14.6
github_commit Patch Available

commit b6aac379982d (wazuh/wazuh)

Patch available: wazuh/wazuh v5.0.0-beta2 (contains commit b6aac379982d)

https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44
github_pr Patch Available

Fix string handling in version comparison function

Patch available: wazuh/wazuh v5.0.0-beta2 (PR #36059 merged 2026-05-13)

https://github.com/wazuh/wazuh/pull/36059
githubMentions a patch (unverified)

Pre-auth stack-buffer-overflow in compare_wazuh_versions reachable from wazuh-authd (TCP/1515) via crafted enrollment V: field · Advisory · wazuh/wazuh · GitHub

https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 50× 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 17:12 UTCEPSS rescore
  3. 2026-10-08 07:48 UTCEG score recompute
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  21. 2026-09-27 13:48 UTCEPSS rescore
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  1. 2026-09-23 17:53 UTCEPSS rescore
  2. 2026-09-23 02:57 UTCEG score recompute
  3. 2026-09-22 02:14 UTCEG score recompute
  4. 2026-09-21 01:48 UTCEG score recompute
  5. 2026-09-20 20:15 UTCEPSS rescore
  6. 2026-09-20 01:11 UTCEG score recompute
  7. 2026-09-19 00:43 UTCEG score recompute
  8. 2026-09-18 19:28 UTCEPSS rescore
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  10. 2026-09-17 19:31 UTCEPSS rescore
  11. 2026-09-16 22:48 UTCEG score recompute
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  13. 2026-09-16 09:50 UTCEG score recompute
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  15. 2026-09-15 14:47 UTCEG score recompute
  16. 2026-09-14 02:06 UTCEG score recompute
  17. 2026-09-13 16:47 UTCEPSS rescore
  18. 2026-09-13 01:40 UTCEG score recompute
  19. 2026-09-12 15:01 UTCEPSS rescore
  20. 2026-09-12 01:13 UTCEG score recompute
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 12:59 UTCEG score recompute
  23. 2026-09-11 09:37 UTCEPSS rescore
  24. 2026-09-10 12:19 UTCEG score recompute
  25. 2026-09-10 09:34 UTCEPSS rescore
  26. 2026-09-09 02:36 UTCEG score recompute
  27. 2026-09-08 22:00 UTCEPSS rescore
  28. 2026-09-08 03:54 UTCEG score recompute
  29. 2026-09-07 16:01 UTCEPSS rescore
  30. 2026-09-07 01:00 UTCEG score recompute
  31. 2026-09-06 13:47 UTCEPSS rescore
  32. 2026-09-06 00:23 UTCEG score recompute
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  34. 2026-09-04 10:41 UTCEG score recompute
  35. 2026-09-04 05:06 UTCEPSS rescore
  36. 2026-09-02 21:19 UTCEG score recompute
  37. 2026-09-02 14:12 UTCEPSS rescore
  38. 2026-09-01 20:30 UTCEG score recompute
  39. 2026-09-01 13:54 UTCEPSS rescore
  40. 2026-09-01 08:18 UTCEG score recompute
  41. 2026-08-31 03:08 UTCEG score recompute
  42. 2026-08-30 19:17 UTCEPSS rescore
  43. 2026-08-30 02:40 UTCEG score recompute
  44. 2026-08-30 01:22 UTCEPSS rescore
  45. 2026-08-29 01:54 UTCEG score recompute
  46. 2026-08-28 21:41 UTCEPSS rescore
  47. 2026-08-27 22:11 UTCEG score recompute
  48. 2026-08-27 14:25 UTCEPSS rescore
  49. 2026-08-26 21:45 UTCEG score recompute
  50. 2026-08-26 14:46 UTCEPSS rescore
  51. 2026-08-25 20:59 UTCEG score recompute
  52. 2026-08-25 13:49 UTCEPSS rescore
  53. 2026-08-24 20:32 UTCEG score recompute
  54. 2026-08-23 07:50 UTCEG score recompute
  55. 2026-08-23 00:19 UTCEPSS rescore
  56. 2026-08-22 07:24 UTCEG score recompute
  57. 2026-08-21 23:49 UTCEPSS rescore
  58. 2026-08-21 06:58 UTCEG score recompute
  59. 2026-08-20 22:55 UTCEPSS rescore
  60. 2026-08-20 06:32 UTCEG score recompute
  61. 2026-08-19 18:18 UTCEG score recompute
  62. 2026-08-19 17:23 UTCEG score recompute
  63. 2026-08-19 16:22 UTCEG score recompute
  64. 2026-08-19 16:22 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-45798?
CVE-2026-45798 is a high vulnerability published on August 19, 2026. Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, comparewazuhversions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not…
When was CVE-2026-45798 disclosed?
CVE-2026-45798 was first published on August 19, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45798 actively exploited?
CVE-2026-45798 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45798?
CVE-2026-45798 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-45798?
A fix for CVE-2026-45798 is available: update to the fixed version the vendor names in its advisory.

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