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
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.8Exploit: None knownExposed: 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)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity48% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
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 (1.28.0-6ubuntu1.4) @ questing2026-08-23ubuntu
ubuntunginx-light (1.10.3-0ubuntu0.16.04.5+esm7) @ xenial2026-08-23ubuntu

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.

Affected Packages

(7 across 7 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
nginx—1.26.3-r1—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
nginx—1.28.3-r1—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
nginx—1.28.3-r1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
nginx1.18.0-6.1 ... 1.18.0-6.1+deb11u5 (6 versions)1.18.0-6.1+deb11u6—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
nginx1.22.1-9 ... 1.22.1-9+deb12u6 (7 versions)1.22.1-9+deb12u7—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nginx1.26.3-3, 1.26.3-3+deb13u1, 1.26.3-3+deb13u2, 1.26.3-3+deb13u3, 1.26.3-3+deb13u41.26.3-3+deb13u5—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nginx1.26.3-3 ... 1.30.0-3 (19 versions)1.30.0-4—

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 6× in last 7d / 59× 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 215 total refreshes for this CVE.

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

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 1% probability of exploitation in the next 30 days, which ranks it in the top 49.6% of all scored CVEs.
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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-40701

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