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: 0.3%, top 79% 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

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
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

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
github Patch Available🟡 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 / 46× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 01:30 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescore
  4. 2026-09-17 01:11 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 00:52 UTCEG score recompute
  8. 2026-09-14 00:14 UTCEG score recompute
  9. 2026-09-13 16:47 UTCEPSS rescore
  10. 2026-09-12 23:55 UTCEG score recompute
  11. 2026-09-12 15:01 UTCEPSS rescore
  12. 2026-09-11 23:36 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 09:37 UTCEPSS rescore
  15. 2026-09-10 22:56 UTCEG score recompute
  16. 2026-09-10 09:34 UTCEPSS rescore
  17. 2026-09-09 05:39 UTCEG score recompute
  18. 2026-09-08 22:00 UTCEPSS rescore
  19. 2026-09-08 05:20 UTCEG score recompute
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-07 04:51 UTCEG score recompute
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-06 04:31 UTCEG score recompute
  24. 2026-09-05 04:12 UTCEG score recompute
  25. 2026-09-04 05:06 UTCEPSS rescore
Show 26 more
  1. 2026-09-03 03:34 UTCEG score recompute
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-02 03:13 UTCEG score recompute
  4. 2026-09-01 13:54 UTCEPSS rescore
  5. 2026-08-31 02:32 UTCEG score recompute
  6. 2026-08-30 19:17 UTCEPSS rescore
  7. 2026-08-30 02:12 UTCEG score recompute
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-29 01:54 UTCEG score recompute
  10. 2026-08-28 21:41 UTCEPSS rescore
  11. 2026-08-26 22:00 UTCEG score recompute
  12. 2026-08-26 14:46 UTCEPSS rescore
  13. 2026-08-25 21:42 UTCEG score recompute
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-24 20:57 UTCEG score recompute
  16. 2026-08-23 20:37 UTCEG score recompute
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 20:19 UTCEG score recompute
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 20:00 UTCEG score recompute
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-19 19:20 UTCEG score recompute
  23. 2026-08-19 18:23 UTCEG score recompute
  24. 2026-08-19 17:23 UTCEG score recompute
  25. 2026-08-19 16:22 UTCEG score recompute
  26. 2026-08-19 16:22 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 78.5% of all scored CVEs.
What is the CVSS score of CVE-2026-44256?
CVE-2026-44256 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-44256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44256, 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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