CVE-2026-74876

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. The CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
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: 0.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

openssl_encrypt versions before 1.4.0 contain a vulnerability in PublicKeyBundle.from_dict() that creates key bundles from untrusted data without verifying signatures. Attackers can call from_dict() followed by to_identity() without signature verification to encrypt data using attacker-controlled public keys, leaking secrets.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

October 1, 2026

Advisory Details (2)

Auto-updated Oct 1, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.0 Unverified Key Bundle Encryption | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-unverified-key-bundle-encryption
github Patch Available

Unverified key bundle from_dict() + to_identity() path allows encryption to attacker keys · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-8h88-gxp3-j7pg

Vendor Advisories for CVE-2026-74876(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 rangeFix by version rangeDependents
openssl-encrypt0.2.2 ... 1.4.0b8 (44 versions)
  • every version up to 1.4.0: fixed in 1.4.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 40× in last 7d / 197× 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 349 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-74876?
CVE-2026-74876 is a critical vulnerability published on August 17, 2026. opensslencrypt versions before 1.4.0 contain a vulnerability in PublicKeyBundle.fromdict() that creates key bundles from untrusted data without verifying signatures. Attackers can call fromdict() followed by toidentity() without signature verification to encrypt data using attacker-controlled…
When was CVE-2026-74876 disclosed?
CVE-2026-74876 was first published on August 17, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74876 actively exploited?
CVE-2026-74876 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74876?
CVE-2026-74876 has a CVSS base score of 9.8 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-74876?
A fix for CVE-2026-74876 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74876 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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