CVE-2026-42946

HIGHNVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.4 under NVD CVSS v3. EPSS exploit probability: 0.9%, top 42% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.4Exploit: None knownExposed: 0

A fix is available — apply it.

A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS v3
7.4
EG Score
7.4(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity74% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

May 13, 2026

Last Modified

June 18, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

myF5

https://my.f5.com/manage/s/article/K000161027

Vendor Advisories for CVE-2026-42946(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) @ resolute2026-08-23ubuntu
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

(8 across 8 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—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
nginx—1.30.1-r0—
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+deb12u7 (8 versions)1.22.1-9+deb12u8—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nginx1.26.3-3 ... 1.26.3-3+deb13u5 (6 versions)1.26.3-3+deb13u6—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nginx1.26.3-3 ... 1.30.0-3 (19 versions)1.30.0-4—

Weakness Classification(2)

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 / 31× 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 244 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-42946?
CVE-2026-42946 is a high vulnerability published on May 13, 2026. A vulnerability exists in the ngxhttpscgimodule and ngxhttpuwsgimodule modules that may result in excessive memory allocation or an over-read of data. When scgipass or uwsgipass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream…
When was CVE-2026-42946 disclosed?
CVE-2026-42946 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42946 actively exploited?
CVE-2026-42946 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 40.9% of all scored CVEs.
What is the CVSS score of CVE-2026-42946?
CVE-2026-42946 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-42946?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42946, 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-2026-42946

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