CVE-2026-74877

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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 contain a missing ownership verification vulnerability in the revoke_key method that allows authenticated clients to revoke any other client's key. Attackers can revoke arbitrary keys by providing a valid ML-DSA signature, bypassing the intended ownership restriction.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.0 Missing Ownership Verification via revoke_key | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-missing-ownership-verification-via-revoke-key
github Patch Available

No owner verification on key revocation — any client can revoke any key · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-hvc7-763r-4f3h

Vendor Advisories for CVE-2026-74877(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 26× in last 7d / 113× 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 130 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74877?
CVE-2026-74877 is a high vulnerability published on August 17, 2026. opensslencrypt versions before 1.4.0 contain a missing ownership verification vulnerability in the revokekey method that allows authenticated clients to revoke any other client's key. Attackers can revoke arbitrary keys by providing a valid ML-DSA signature, bypassing the intended ownership…
When was CVE-2026-74877 disclosed?
CVE-2026-74877 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-2026-74877 actively exploited?
CVE-2026-74877 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 83.6% of all scored CVEs.
What is the CVSS score of CVE-2026-74877?
CVE-2026-74877 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-74877?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74877, 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-2026-74877

Explore →

Is Your Infrastructure Affected by CVE-2026-74877?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs