CVE-2026-74878

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH 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 — 4 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(high)
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
31%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Aug 17, 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 34× in last 7d / 34× 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.

  1. 2026-08-21 05:04 UTCGHSA enrichment
  2. 2026-08-21 00:48 UTCEG score recompute
  3. 2026-08-21 00:48 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 20:33 UTCGHSA enrichment
  6. 2026-08-20 16:18 UTCGHSA enrichment
  7. 2026-08-20 12:03 UTCGHSA enrichment
  8. 2026-08-20 07:47 UTCGHSA enrichment
  9. 2026-08-20 03:32 UTCGHSA enrichment
  10. 2026-08-19 23:17 UTCGHSA enrichment
  11. 2026-08-19 19:02 UTCEG score recompute
  12. 2026-08-19 19:02 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 14:47 UTCGHSA enrichment
  15. 2026-08-19 10:30 UTCGHSA enrichment
  16. 2026-08-19 06:14 UTCGHSA enrichment
  17. 2026-08-19 01:52 UTCGHSA enrichment
  18. 2026-08-18 21:37 UTCGHSA enrichment
  19. 2026-08-18 16:59 UTCEG score recompute
  20. 2026-08-18 16:59 UTCGHSA enrichment
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 12:40 UTCGHSA enrichment
  24. 2026-08-18 08:25 UTCGHSA enrichment
  25. 2026-08-18 04:08 UTCGHSA enrichment
Show 9 more
  1. 2026-08-17 23:52 UTCGHSA enrichment
  2. 2026-08-17 19:36 UTCGHSA enrichment
  3. 2026-08-17 15:21 UTCEG score recompute
  4. 2026-08-17 15:21 UTCGHSA enrichment
  5. 2026-08-17 14:44 UTCEG score recompute
  6. 2026-08-17 14:44 UTCGHSA enrichment
  7. 2026-08-17 11:39 UTCEG score recompute
  8. 2026-08-17 11:13 UTCEG score recompute
  9. 2026-08-17 11:12 UTCMITRE cvelistV5first tracked

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. 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 69.5% 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

Explore →

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