CVE-2026-44256

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed 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 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control characters. api/api/alogging.py interpolates that value into the plain-text API log. An unauthenticated attacker can include carriage returns or line feeds in the username to forge entries, obscure activity, or poison systems that consume the plain-text audit log. The JSON log format is not affected because JSON serialization escapes these characters. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA 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
Severity53% × 45%
Exploitation0% × 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
0.5%
EPSS %ILE
39th
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 none (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 18, 2026

Advisory Details (5)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github, github_pr.
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 cddf3fd16b0f (wazuh/wazuh)

Patch available: wazuh/wazuh v5.0.0-beta2 (contains commit cddf3fd16b0f)

https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926
github_pr Patch Available

Validate user name in API

Patch available: wazuh/wazuh v5.0.0-beta2 (PR #35866 merged 2026-05-04)

https://github.com/wazuh/wazuh/pull/35866
githubMentions a patch (unverified)🟡 PoC Available

CRLF Log Injection via Unsanitized Basic-Auth Username · Advisory · wazuh/wazuh · GitHub

https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× 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 09:07 UTCEG score recompute
  4. 2026-10-07 23:48 UTCEPSS rescore
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  6. 2026-10-06 15:18 UTCEPSS rescore
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  13. 2026-10-01 19:50 UTCEPSS rescore
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  15. 2026-09-30 15:03 UTCEPSS rescore
  16. 2026-09-30 08:44 UTCEG score recompute
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  19. 2026-09-27 13:48 UTCEPSS rescore
  20. 2026-09-27 06:57 UTCEG score recompute
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  22. 2026-09-24 20:28 UTCEG score recompute
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  24. 2026-09-23 17:53 UTCEPSS rescore
  25. 2026-09-22 19:50 UTCEG score recompute
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  1. 2026-09-21 16:18 UTCEG score recompute
  2. 2026-09-20 20:15 UTCEPSS rescore
  3. 2026-09-20 15:49 UTCEG score recompute
  4. 2026-09-19 15:26 UTCEG score recompute
  5. 2026-09-18 19:28 UTCEPSS rescore
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  7. 2026-09-17 19:31 UTCEPSS rescore
  8. 2026-09-17 01:11 UTCEG score recompute
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-16 00:52 UTCEG score recompute
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  13. 2026-09-13 16:47 UTCEPSS rescore
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  15. 2026-09-12 15:01 UTCEPSS rescore
  16. 2026-09-11 23:36 UTCEG score recompute
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 09:37 UTCEPSS rescore
  19. 2026-09-10 22:56 UTCEG score recompute
  20. 2026-09-10 09:34 UTCEPSS rescore
  21. 2026-09-09 05:39 UTCEG score recompute
  22. 2026-09-08 22:00 UTCEPSS rescore
  23. 2026-09-08 05:20 UTCEG score recompute
  24. 2026-09-07 16:01 UTCEPSS rescore
  25. 2026-09-07 04:51 UTCEG score recompute
  26. 2026-09-06 13:47 UTCEPSS rescore
  27. 2026-09-06 04:31 UTCEG score recompute
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  29. 2026-09-04 05:06 UTCEPSS rescore
  30. 2026-09-03 03:34 UTCEG score recompute
  31. 2026-09-02 14:12 UTCEPSS rescore
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  33. 2026-09-01 13:54 UTCEPSS rescore
  34. 2026-08-31 02:32 UTCEG score recompute
  35. 2026-08-30 19:17 UTCEPSS rescore
  36. 2026-08-30 02:12 UTCEG score recompute
  37. 2026-08-30 01:22 UTCEPSS rescore
  38. 2026-08-29 01:54 UTCEG score recompute
  39. 2026-08-28 21:41 UTCEPSS rescore
  40. 2026-08-26 22:00 UTCEG score recompute
  41. 2026-08-26 14:46 UTCEPSS rescore
  42. 2026-08-25 21:42 UTCEG score recompute
  43. 2026-08-25 13:49 UTCEPSS rescore
  44. 2026-08-24 20:57 UTCEG score recompute
  45. 2026-08-23 20:37 UTCEG score recompute
  46. 2026-08-23 00:19 UTCEPSS rescore
  47. 2026-08-22 20:19 UTCEG score recompute
  48. 2026-08-21 23:49 UTCEPSS rescore
  49. 2026-08-21 20:00 UTCEG score recompute
  50. 2026-08-20 22:55 UTCEPSS rescore
  51. 2026-08-19 19:20 UTCEG score recompute
  52. 2026-08-19 18:23 UTCEG score recompute
  53. 2026-08-19 17:23 UTCEG score recompute
  54. 2026-08-19 16:22 UTCEG score recompute
  55. 2026-08-19 16:22 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-44256?
CVE-2026-44256 is a medium vulnerability published on August 19, 2026. Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control…
When was CVE-2026-44256 disclosed?
CVE-2026-44256 was first published on August 19, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44256 actively exploited?
CVE-2026-44256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44256?
CVE-2026-44256 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44256?
A fix for CVE-2026-44256 is available: update to the fixed version the vendor names in its advisory.

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