CVE-2026-74878

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: 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 use an in-memory rate limiter for TOTP brute-force protection that is not shared across workers and is lost on server restart. Attackers can distribute authentication attempts across multiple server instances or retry immediately after a restart to bypass rate limiting protections.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 1, 2026

Advisory Details (2)

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

openssl_encrypt before 1.4.0 TOTP Rate Limiter Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-totp-rate-limiter-bypass
github Patch Available

TOTP rate limiter is in-memory only — not shared across workers, lost on restart · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-h45m-mgcp-q388

Vendor Advisories for CVE-2026-74878(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 48× in last 7d / 208× 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 235 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74878?
CVE-2026-74878 is a critical vulnerability published on August 17, 2026. openssl_encrypt versions before 1.4.0 use an in-memory rate limiter for TOTP brute-force protection that is not shared across workers and is lost on server restart. Attackers can distribute authentication attempts across multiple server instances or retry immediately after a restart to bypass rate…
When was CVE-2026-74878 disclosed?
CVE-2026-74878 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74878 actively exploited?
CVE-2026-74878 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 66.2% of all scored CVEs.
What is the CVSS score of CVE-2026-74878?
CVE-2026-74878 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-74878?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74878, 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-2026-74878

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