CVE-2026-40701

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-05-13. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 4.8Exploit: NoneExposed: 0

A fix is available — apply it.

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.

 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS v3
4.8
EG Score
4.8(medium)
EPSS
48.1%
KEV
Not listed

Published

May 13, 2026

Last Modified

June 23, 2026

Advisory Details (1)

Auto-updated Jun 17, 2026
No patch confirmed yet.
generic

myF5

https://my.f5.com/manage/s/article/K000161021

Vendor Advisories for CVE-2026-40701(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntunginx-light (1.28.3-2ubuntu1.2) @ resolute2026-06-28ubuntu
ubuntunginx-light (1.10.3-0ubuntu0.16.04.5+esm7) @ xenial2026-06-28ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 52× 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 137 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-40701?
CVE-2026-40701 is a medium vulnerability published on May 13, 2026. NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpsslmodule module when the sslverifyclient directive is set to "on" or "optional," and the sslocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker…
When was CVE-2026-40701 disclosed?
CVE-2026-40701 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40701 actively exploited?
CVE-2026-40701 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40701?
CVE-2026-40701 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-40701?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40701, 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.

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