CVE-2026-16042

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-08-02. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

The LWS Optimize WordPress plugin before 3.4 does not perform a capability check on its cache-clearing actions, allowing any authenticated user, including Subscribers, to flush the site's caches and force repeated cache rebuilds.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 2, 2026

Last Modified

August 4, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

LWS Optimize < 3.4 – Subscriber+ Cache Deletion | CVE 2026-16042 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/0ea45a09-3155-4e47-97f7-f7645d583565/

Vendor Advisories for CVE-2026-16042(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 16× in last 7d / 53× 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. 2026-08-20 14:22 UTCEG score recompute
  2. 2026-08-20 14:22 UTCGHSA enrichment
  3. 2026-08-19 17:03 UTCEPSS rescore
  4. 2026-08-19 11:56 UTCEG score recompute
  5. 2026-08-19 11:55 UTCGHSA enrichment
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-18 10:40 UTCGHSA enrichment
  8. 2026-08-17 09:25 UTCEG score recompute
  9. 2026-08-17 09:25 UTCGHSA enrichment
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 08:10 UTCEG score recompute
  12. 2026-08-16 08:10 UTCGHSA enrichment
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-15 06:56 UTCEG score recompute
  15. 2026-08-15 06:56 UTCGHSA enrichment
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-14 05:37 UTCEG score recompute
  18. 2026-08-14 05:37 UTCGHSA enrichment
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-13 04:22 UTCEG score recompute
  21. 2026-08-13 04:22 UTCGHSA enrichment
  22. 2026-08-12 13:50 UTCEPSS rescore
  23. 2026-08-12 03:08 UTCEG score recompute
  24. 2026-08-12 03:08 UTCGHSA enrichment
  25. 2026-08-11 13:42 UTCEPSS rescore
Show 28 more
  1. 2026-08-11 01:53 UTCEG score recompute
  2. 2026-08-11 01:53 UTCGHSA enrichment
  3. 2026-08-11 00:00 UTCEPSS rescore
  4. 2026-08-10 00:38 UTCEG score recompute
  5. 2026-08-10 00:38 UTCGHSA enrichment
  6. 2026-08-09 13:46 UTCEPSS rescore
  7. 2026-08-08 23:24 UTCEG score recompute
  8. 2026-08-08 23:24 UTCGHSA enrichment
  9. 2026-08-08 16:37 UTCEPSS rescore
  10. 2026-08-07 22:09 UTCEG score recompute
  11. 2026-08-07 22:09 UTCGHSA enrichment
  12. 2026-08-06 20:55 UTCEG score recompute
  13. 2026-08-06 20:55 UTCGHSA enrichment
  14. 2026-08-06 13:46 UTCEPSS rescore
  15. 2026-08-05 19:40 UTCEG score recompute
  16. 2026-08-05 19:40 UTCGHSA enrichment
  17. 2026-08-05 19:17 UTCEPSS rescore
  18. 2026-08-04 18:26 UTCEG score recompute
  19. 2026-08-04 18:26 UTCGHSA enrichment
  20. 2026-08-04 17:51 UTCEG score recompute▲ 4.30
  21. 2026-08-04 17:50 UTCGHSA enrichment
  22. 2026-08-04 17:46 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  23. 2026-08-04 10:38 UTCEPSS rescore
  24. 2026-08-03 10:35 UTCEPSS rescore
  25. 2026-08-02 06:36 UTCGHSA enrichment
  26. 2026-08-02 06:35 UTCNVD update
  27. 2026-08-02 06:07 UTCEG score recompute
  28. 2026-08-02 06:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16042?
CVE-2026-16042 is a medium vulnerability published on August 2, 2026. The LWS Optimize WordPress plugin before 3.4 does not perform a capability check on its cache-clearing actions, allowing any authenticated user, including Subscribers, to flush the site's caches and force repeated cache rebuilds.
When was CVE-2026-16042 disclosed?
CVE-2026-16042 was first published in the National Vulnerability Database on August 2, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16042 actively exploited?
CVE-2026-16042 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 90.5% of all scored CVEs.
What is the CVSS score of CVE-2026-16042?
CVE-2026-16042 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16042?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16042, 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-2026-16042

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