CVE-2026-74882

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

openssl_encrypt versions before 1.4.0 contain an insecure default configuration that trusts the entire RFC 1918 private address space in IntegrityProxyConfig trusted_proxies. Attackers on private networks can forge client certificate headers to bypass mTLS authentication when ProxyAuth validation is relaxed or modified.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.0 Insecure Default Configuration | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-insecure-default-configuration
github Patch Available

Integrity proxy trusts entire RFC 1918 private address space by default · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-2592-7m3g-7fq6

Vendor Advisories for CVE-2026-74882(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
openssl-encrypt0.2.2 ... 1.4.0b8 (44 versions)1.4.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 53× in last 7d / 182× 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 199 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74882?
CVE-2026-74882 is a critical vulnerability published on August 17, 2026. opensslencrypt versions before 1.4.0 contain an insecure default configuration that trusts the entire RFC 1918 private address space in IntegrityProxyConfig trustedproxies. Attackers on private networks can forge client certificate headers to bypass mTLS authentication when ProxyAuth validation is…
When was CVE-2026-74882 disclosed?
CVE-2026-74882 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74882 actively exploited?
CVE-2026-74882 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 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-74882?
CVE-2026-74882 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-74882?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74882, 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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