CVE-2026-18356

LOWPre-NVD 3.73.7—
EchelonGraph scoreHIGH confidence

Score 3.7 from GitHub Security Advisory (severity: LOW) published 2026-08-21. a secondary CVSS source baseline 3.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
3.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.7Exploit: None knownExposed: 0

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

The Limit Login Attempts Reloaded WordPress plugin before 3.3.5 does not compare logins against its username denylist case-insensitively and does not account for the account's email address, allowing an account an administrator intended to block from logging in to authenticate anyway.

CVSS v3
3.7
EG Score
3.7(high)
EG Risk
17(Track)
EG Risk 17/100SSVC: 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
Severity37% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 26, 2026

References (1)

Vendor Advisories for CVE-2026-18356(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 11× 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. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-17 21:17 UTCEG score recompute
  3. 2026-09-17 21:17 UTCGHSA enrichment
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 05:14 UTCEPSS rescore
  6. 2026-09-15 01:39 UTCEG score recompute
  7. 2026-09-15 01:39 UTCGHSA enrichment
  8. 2026-09-13 16:46 UTCEPSS rescore
  9. 2026-09-12 15:00 UTCEPSS rescore
  10. 2026-09-12 07:19 UTCEG score recompute
  11. 2026-09-12 07:19 UTCGHSA enrichment
  12. 2026-09-11 14:52 UTCEPSS rescore
  13. 2026-09-11 09:36 UTCEPSS rescore
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-09 12:59 UTCEG score recompute
  16. 2026-09-09 12:58 UTCGHSA enrichment
  17. 2026-09-08 22:00 UTCEPSS rescore
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-06 18:39 UTCEG score recompute
  20. 2026-09-06 18:39 UTCGHSA enrichment
  21. 2026-09-06 13:47 UTCEPSS rescore
  22. 2026-09-04 05:06 UTCEPSS rescore
  23. 2026-09-04 00:19 UTCEG score recompute
  24. 2026-09-04 00:19 UTCGHSA enrichment
  25. 2026-09-02 14:11 UTCEPSS rescore
Show 23 more
  1. 2026-09-01 13:53 UTCEPSS rescore
  2. 2026-09-01 05:57 UTCEG score recompute
  3. 2026-09-01 05:57 UTCGHSA enrichment
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-29 11:19 UTCEG score recompute
  7. 2026-08-29 11:18 UTCGHSA enrichment
  8. 2026-08-28 21:41 UTCEPSS rescore
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-26 16:48 UTCEG score recompute
  11. 2026-08-26 16:47 UTCGHSA enrichment
  12. 2026-08-26 14:46 UTCEPSS rescore
  13. 2026-08-25 13:48 UTCEPSS rescore
  14. 2026-08-24 07:39 UTCEG score recompute
  15. 2026-08-24 07:39 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-21 13:20 UTCEG score recompute
  18. 2026-08-21 13:20 UTCGHSA enrichment
  19. 2026-08-21 13:09 UTCEG score recompute
  20. 2026-08-21 13:09 UTCGHSA enrichment
  21. 2026-08-21 12:19 UTCEG score recompute
  22. 2026-08-21 11:55 UTCEG score recompute
  23. 2026-08-21 11:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18356?
CVE-2026-18356 is a low vulnerability published on August 21, 2026. The Limit Login Attempts Reloaded WordPress plugin before 3.3.5 does not compare logins against its username denylist case-insensitively and does not account for the account's email address, allowing an account an administrator intended to block from logging in to authenticate anyway.
When was CVE-2026-18356 disclosed?
CVE-2026-18356 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18356 actively exploited?
CVE-2026-18356 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 90.2% of all scored CVEs.
What is the CVSS score of CVE-2026-18356?
CVE-2026-18356 has a CVSS v3 base score of 3.7 (NVD).
How do I remediate CVE-2026-18356?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18356, 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

Explore the affected products and dependency analysis for CVE-2026-18356

Explore →

Is Your Infrastructure Affected by CVE-2026-18356?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs