CVE-2026-16940

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

The Custom Fields WordPress plugin before 1.5.1 does not validate a user-supplied file path before deletion, allowing unauthenticated users to delete arbitrary files on the server (such as wp-config.php), which can lead to a full site takeover.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 6, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Custom Fields for WooCommerce < 1.5.1 – Unauthenticated Arbitrary File Deletion via Path Traversal | CVE 2026-16940 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/a315a6ac-3ffb-4735-92ca-6e85338f8807/

Vendor Advisories for CVE-2026-16940(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 56× in last 7d / 124× 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.

Showing the most recent 100 of 124 total refreshes for this CVE.

  1. 2026-08-21 02:21 UTCEG score recompute
  2. 2026-08-21 02:21 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 22:25 UTCGHSA enrichment
  5. 2026-08-20 18:29 UTCGHSA enrichment
  6. 2026-08-20 14:33 UTCGHSA enrichment
  7. 2026-08-20 10:38 UTCGHSA enrichment
  8. 2026-08-20 06:43 UTCGHSA enrichment
  9. 2026-08-20 02:46 UTCGHSA enrichment
  10. 2026-08-19 22:50 UTCGHSA enrichment
  11. 2026-08-19 18:54 UTCEG score recompute
  12. 2026-08-19 18:54 UTCGHSA enrichment
  13. 2026-08-19 17:03 UTCEPSS rescore
  14. 2026-08-19 14:16 UTCGHSA enrichment
  15. 2026-08-19 10:21 UTCGHSA enrichment
  16. 2026-08-19 06:24 UTCGHSA enrichment
  17. 2026-08-19 02:11 UTCGHSA enrichment
  18. 2026-08-18 22:14 UTCGHSA enrichment
  19. 2026-08-18 18:16 UTCEG score recompute
  20. 2026-08-18 18:16 UTCGHSA enrichment
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-18 12:49 UTCGHSA enrichment
  23. 2026-08-18 08:49 UTCGHSA enrichment
  24. 2026-08-18 04:54 UTCGHSA enrichment
  25. 2026-08-18 00:58 UTCGHSA enrichment
Show 75 more
  1. 2026-08-17 20:28 UTCGHSA enrichment
  2. 2026-08-17 16:32 UTCEG score recompute
  3. 2026-08-17 16:32 UTCGHSA enrichment
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-17 12:23 UTCGHSA enrichment
  6. 2026-08-17 08:23 UTCGHSA enrichment
  7. 2026-08-17 04:28 UTCGHSA enrichment
  8. 2026-08-17 00:32 UTCGHSA enrichment
  9. 2026-08-16 20:36 UTCGHSA enrichment
  10. 2026-08-16 16:40 UTCEG score recompute
  11. 2026-08-16 16:40 UTCGHSA enrichment
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 12:39 UTCGHSA enrichment
  14. 2026-08-16 08:43 UTCGHSA enrichment
  15. 2026-08-16 04:47 UTCEG score recompute
  16. 2026-08-16 04:47 UTCGHSA enrichment
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-16 00:52 UTCGHSA enrichment
  19. 2026-08-15 20:56 UTCGHSA enrichment
  20. 2026-08-15 17:00 UTCGHSA enrichment
  21. 2026-08-15 13:04 UTCGHSA enrichment
  22. 2026-08-15 09:08 UTCGHSA enrichment
  23. 2026-08-15 05:12 UTCEG score recompute
  24. 2026-08-15 05:12 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
  26. 2026-08-15 01:16 UTCGHSA enrichment
  27. 2026-08-14 21:21 UTCGHSA enrichment
  28. 2026-08-14 17:22 UTCGHSA enrichment
  29. 2026-08-14 13:17 UTCGHSA enrichment
  30. 2026-08-14 09:22 UTCGHSA enrichment
  31. 2026-08-14 05:26 UTCGHSA enrichment
  32. 2026-08-14 01:31 UTCEG score recompute
  33. 2026-08-14 01:31 UTCGHSA enrichment
  34. 2026-08-13 22:00 UTCEPSS rescore
  35. 2026-08-13 21:35 UTCGHSA enrichment
  36. 2026-08-13 17:39 UTCGHSA enrichment
  37. 2026-08-13 13:34 UTCGHSA enrichment
  38. 2026-08-13 09:39 UTCGHSA enrichment
  39. 2026-08-13 05:44 UTCGHSA enrichment
  40. 2026-08-13 01:49 UTCGHSA enrichment
  41. 2026-08-12 21:53 UTCGHSA enrichment
  42. 2026-08-12 17:58 UTCGHSA enrichment
  43. 2026-08-12 14:02 UTCEG score recompute
  44. 2026-08-12 14:02 UTCGHSA enrichment
  45. 2026-08-12 13:50 UTCEPSS rescore
  46. 2026-08-12 10:03 UTCGHSA enrichment
  47. 2026-08-12 06:07 UTCGHSA enrichment
  48. 2026-08-12 02:12 UTCGHSA enrichment
  49. 2026-08-11 22:16 UTCGHSA enrichment
  50. 2026-08-11 18:20 UTCGHSA enrichment
  51. 2026-08-11 14:25 UTCEG score recompute
  52. 2026-08-11 14:25 UTCGHSA enrichment
  53. 2026-08-11 13:42 UTCEPSS rescore
  54. 2026-08-11 10:28 UTCGHSA enrichment
  55. 2026-08-11 06:33 UTCGHSA enrichment
  56. 2026-08-11 02:37 UTCEG score recompute
  57. 2026-08-11 02:37 UTCGHSA enrichment
  58. 2026-08-11 00:00 UTCEPSS rescore
  59. 2026-08-10 22:42 UTCGHSA enrichment
  60. 2026-08-10 18:46 UTCGHSA enrichment
  61. 2026-08-10 14:50 UTCGHSA enrichment
  62. 2026-08-10 10:54 UTCGHSA enrichment
  63. 2026-08-10 06:58 UTCGHSA enrichment
  64. 2026-08-10 03:03 UTCGHSA enrichment
  65. 2026-08-09 23:07 UTCGHSA enrichment
  66. 2026-08-09 19:12 UTCGHSA enrichment
  67. 2026-08-09 15:16 UTCEG score recompute
  68. 2026-08-09 15:16 UTCGHSA enrichment
  69. 2026-08-09 13:46 UTCEPSS rescore
  70. 2026-08-09 11:21 UTCGHSA enrichment
  71. 2026-08-09 07:25 UTCGHSA enrichment
  72. 2026-08-09 03:30 UTCGHSA enrichment
  73. 2026-08-08 23:34 UTCGHSA enrichment
  74. 2026-08-08 19:38 UTCEG score recompute
  75. 2026-08-08 19:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16940?
CVE-2026-16940 is a critical vulnerability published on August 5, 2026. The Custom Fields WordPress plugin before 1.5.1 does not validate a user-supplied file path before deletion, allowing unauthenticated users to delete arbitrary files on the server (such as wp-config.php), which can lead to a full site takeover.
When was CVE-2026-16940 disclosed?
CVE-2026-16940 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16940 actively exploited?
CVE-2026-16940 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 66.6% of all scored CVEs.
What is the CVSS score of CVE-2026-16940?
CVE-2026-16940 has a CVSS v3.1 base score of 10.0 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16940?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16940, 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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