CVE-2026-74888

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. The CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
7.5EG
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: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call in an outer loop, creating a KDF whose security properties have not been formally analyzed. Attackers can exploit this weakened key derivation to more efficiently crack passwords protecting legacy encrypted files compared to standard PBKDF2 implementations.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA 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
Severity75% × 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
17th
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 partial (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 Aug 17, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.0 Non-Standard PBKDF2 Key Derivation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-non-standard-pbkdf2-key-derivation
github Patch Available

Custom PBKDF2 loop uses iterations=1 per call — non-standard construction · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-743f-89fg-x288

Vendor Advisories for CVE-2026-74888(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 23× in last 7d / 101× 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 178 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-74888?
CVE-2026-74888 is a high vulnerability published on August 17, 2026. openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call in an outer loop, creating a KDF whose security properties have not been formally analyzed. Attackers can exploit this weakened key derivation to more efficiently crack passwords…
When was CVE-2026-74888 disclosed?
CVE-2026-74888 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-2026-74888 actively exploited?
CVE-2026-74888 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74888?
CVE-2026-74888 has a CVSS base score of 7.5 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-74888?
A fix for CVE-2026-74888 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74888 are linked in the Vendor Advisories panel on this page.

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