CVE-2026-81718

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-27. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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%CVSS: 7.5Exploit: 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 1.4.9 use under-parameterized PBKDF2-HMAC-SHA256 with only 100,000 iterations to protect PQC keyfile private keys and 10,000 iterations for dual-encryption file-password verification. Attackers who obtain keyfiles or encrypted files can brute-force wrapping passwords offline using GPU or ASIC acceleration.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.9 Weak Cryptographic Parameters | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-weak-cryptographic-parameters
github Patch Available

Weak PBKDF2 parameters protecting keyfile private key and dual-encrypt second factor · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-fmjx-p826-6fvr

Vendor Advisories for CVE-2026-81718(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 87× 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. 2026-09-19 14:32 UTCGHSA enrichment
  2. 2026-09-19 02:30 UTCEG score recompute
  3. 2026-09-19 02:30 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 14:25 UTCGHSA enrichment
  6. 2026-09-18 02:23 UTCEG score recompute
  7. 2026-09-18 02:23 UTCGHSA enrichment
  8. 2026-09-17 14:21 UTCGHSA enrichment
  9. 2026-09-17 02:10 UTCEG score recompute
  10. 2026-09-17 02:10 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 14:08 UTCEG score recompute
  13. 2026-09-16 14:08 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-16 01:14 UTCGHSA enrichment
  16. 2026-09-15 13:11 UTCEG score recompute
  17. 2026-09-15 13:11 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 01:09 UTCGHSA enrichment
  21. 2026-09-14 13:07 UTCGHSA enrichment
  22. 2026-09-14 01:05 UTCEG score recompute
  23. 2026-09-14 01:05 UTCGHSA enrichment
  24. 2026-09-13 13:03 UTCGHSA enrichment
  25. 2026-09-13 01:01 UTCEG score recompute
Show 62 more
  1. 2026-09-13 01:01 UTCGHSA enrichment
  2. 2026-09-12 12:59 UTCGHSA enrichment
  3. 2026-09-12 00:57 UTCGHSA enrichment
  4. 2026-09-11 12:55 UTCEG score recompute
  5. 2026-09-11 12:55 UTCGHSA enrichment
  6. 2026-09-11 00:50 UTCGHSA enrichment
  7. 2026-09-10 12:49 UTCEG score recompute
  8. 2026-09-10 12:49 UTCGHSA enrichment
  9. 2026-09-10 00:46 UTCGHSA enrichment
  10. 2026-09-09 12:45 UTCGHSA enrichment
  11. 2026-09-09 00:40 UTCEG score recompute
  12. 2026-09-09 00:40 UTCGHSA enrichment
  13. 2026-09-08 22:01 UTCEPSS rescore
  14. 2026-09-08 11:20 UTCGHSA enrichment
  15. 2026-09-07 21:06 UTCEG score recompute
  16. 2026-09-07 21:06 UTCGHSA enrichment
  17. 2026-09-07 09:04 UTCGHSA enrichment
  18. 2026-09-06 20:54 UTCEG score recompute
  19. 2026-09-06 20:54 UTCGHSA enrichment
  20. 2026-09-06 13:48 UTCEPSS rescore
  21. 2026-09-06 08:52 UTCGHSA enrichment
  22. 2026-09-05 20:50 UTCGHSA enrichment
  23. 2026-09-05 08:49 UTCGHSA enrichment
  24. 2026-09-04 20:47 UTCEG score recompute
  25. 2026-09-04 20:47 UTCGHSA enrichment
  26. 2026-09-04 08:41 UTCEG score recompute
  27. 2026-09-04 08:40 UTCGHSA enrichment
  28. 2026-09-04 05:07 UTCEPSS rescore
  29. 2026-09-03 20:37 UTCGHSA enrichment
  30. 2026-09-03 08:35 UTCGHSA enrichment
  31. 2026-09-02 20:29 UTCEG score recompute
  32. 2026-09-02 20:29 UTCGHSA enrichment
  33. 2026-09-02 14:12 UTCEPSS rescore
  34. 2026-09-02 06:28 UTCGHSA enrichment
  35. 2026-09-01 18:26 UTCEG score recompute
  36. 2026-09-01 18:25 UTCGHSA enrichment
  37. 2026-09-01 13:54 UTCEPSS rescore
  38. 2026-09-01 06:21 UTCEG score recompute
  39. 2026-09-01 06:21 UTCGHSA enrichment
  40. 2026-09-01 04:40 UTCEPSS rescore
  41. 2026-09-01 04:40 UTCEPSS rescore
  42. 2026-08-31 18:18 UTCEG score recompute
  43. 2026-08-31 18:18 UTCGHSA enrichment
  44. 2026-08-31 17:58 UTCGHSA enrichment
  45. 2026-08-31 05:53 UTCEG score recompute
  46. 2026-08-31 05:53 UTCGHSA enrichment
  47. 2026-08-30 19:18 UTCEPSS rescore
  48. 2026-08-30 19:17 UTCEPSS rescore
  49. 2026-08-30 17:51 UTCGHSA enrichment
  50. 2026-08-30 05:48 UTCEG score recompute
  51. 2026-08-30 05:48 UTCGHSA enrichment
  52. 2026-08-30 01:22 UTCEPSS rescore
  53. 2026-08-29 17:46 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 17:38 UTCGHSA enrichment
  58. 2026-08-28 05:30 UTCEG score recompute
  59. 2026-08-28 05:30 UTCGHSA enrichment
  60. 2026-08-27 17:24 UTCEG score recompute
  61. 2026-08-27 16:47 UTCEG score recompute
  62. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81718?
CVE-2026-81718 is a high vulnerability published on August 27, 2026. openssl_encrypt versions before 1.4.9 use under-parameterized PBKDF2-HMAC-SHA256 with only 100,000 iterations to protect PQC keyfile private keys and 10,000 iterations for dual-encryption file-password verification. Attackers who obtain keyfiles or encrypted files can brute-force wrapping passwords…
When was CVE-2026-81718 disclosed?
CVE-2026-81718 was first published in the National Vulnerability Database on August 27, 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-2026-81718 actively exploited?
CVE-2026-81718 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 96.9% of all scored CVEs.
What is the CVSS score of CVE-2026-81718?
CVE-2026-81718 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-81718?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81718, 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

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