CVE-2026-9638

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts.

These versions use the built-in rand function, which is predictable and unsuitable for cryptography.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
22.3%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 12, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-9638: Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts

http://www.openwall.com/lists/oss-security/2026/06/12/4
generic

Changes - metacpan.org

https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes
generic

lib/Crypt/PBKDF2.pm - metacpan.org

https://metacpan.org/dist/Crypt-PBKDF2/source/lib/Crypt/PBKDF2.pm#L86-93

Vendor Advisories for CVE-2026-9638(1)

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

Data Freshness Timeline

(refreshed 0× in last 7d / 0× 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. 2026-07-07 01:09 UTCEG score recompute
  2. 2026-07-07 01:09 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 21:37 UTCEG score recompute
  6. 2026-07-05 21:37 UTCGHSA enrichment
  7. 2026-07-05 09:44 UTCEG score recompute
  8. 2026-07-05 09:44 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-04 22:18 UTCEG score recompute
  11. 2026-07-04 22:18 UTCGHSA enrichment
  12. 2026-07-04 10:54 UTCEG score recompute
  13. 2026-07-04 10:54 UTCGHSA enrichment
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 15:36 UTCEG score recompute
  16. 2026-07-03 15:36 UTCGHSA enrichment
  17. 2026-07-03 04:12 UTCEG score recompute
  18. 2026-07-03 04:12 UTCGHSA enrichment
  19. 2026-07-02 16:30 UTCEG score recompute
  20. 2026-07-02 16:30 UTCGHSA enrichment
  21. 2026-07-02 05:04 UTCEG score recompute
  22. 2026-07-02 05:04 UTCGHSA enrichment
  23. 2026-07-01 17:40 UTCEG score recompute
  24. 2026-07-01 17:40 UTCGHSA enrichment
  25. 2026-07-01 15:07 UTCEPSS rescore
Show 75 more
  1. 2026-07-01 06:15 UTCEG score recompute
  2. 2026-07-01 06:15 UTCGHSA enrichment
  3. 2026-06-30 23:22 UTCEPSS rescore
  4. 2026-06-30 18:38 UTCEG score recompute
  5. 2026-06-30 18:38 UTCGHSA enrichment
  6. 2026-06-30 07:14 UTCEG score recompute
  7. 2026-06-30 07:14 UTCGHSA enrichment
  8. 2026-06-29 19:51 UTCEG score recompute
  9. 2026-06-29 19:51 UTCGHSA enrichment
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-29 08:27 UTCEG score recompute
  12. 2026-06-29 08:27 UTCGHSA enrichment
  13. 2026-06-28 21:04 UTCEG score recompute
  14. 2026-06-28 21:04 UTCGHSA enrichment
  15. 2026-06-28 14:07 UTCEPSS rescore
  16. 2026-06-28 09:41 UTCEG score recompute
  17. 2026-06-28 09:41 UTCGHSA enrichment
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-27 22:18 UTCEG score recompute
  20. 2026-06-27 22:18 UTCGHSA enrichment
  21. 2026-06-27 10:54 UTCEG score recompute
  22. 2026-06-27 10:54 UTCGHSA enrichment
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-26 23:29 UTCEG score recompute
  25. 2026-06-26 23:29 UTCGHSA enrichment
  26. 2026-06-26 12:06 UTCEG score recompute
  27. 2026-06-26 12:05 UTCGHSA enrichment
  28. 2026-06-25 23:50 UTCEG score recompute
  29. 2026-06-25 23:50 UTCGHSA enrichment
  30. 2026-06-25 13:50 UTCEPSS rescore
  31. 2026-06-25 12:27 UTCEG score recompute
  32. 2026-06-25 12:27 UTCGHSA enrichment
  33. 2026-06-25 01:03 UTCEG score recompute
  34. 2026-06-25 01:03 UTCGHSA enrichment
  35. 2026-06-24 14:05 UTCEPSS rescore
  36. 2026-06-24 13:39 UTCEG score recompute
  37. 2026-06-24 13:39 UTCGHSA enrichment
  38. 2026-06-24 02:15 UTCEG score recompute
  39. 2026-06-24 02:15 UTCGHSA enrichment
  40. 2026-06-23 21:33 UTCEPSS rescore
  41. 2026-06-23 14:52 UTCEG score recompute
  42. 2026-06-23 14:52 UTCGHSA enrichment
  43. 2026-06-23 03:14 UTCEG score recompute
  44. 2026-06-23 03:13 UTCGHSA enrichment
  45. 2026-06-22 15:42 UTCEG score recompute
  46. 2026-06-22 15:41 UTCGHSA enrichment
  47. 2026-06-22 14:25 UTCEPSS rescore
  48. 2026-06-22 04:10 UTCEG score recompute
  49. 2026-06-22 04:10 UTCGHSA enrichment
  50. 2026-06-21 16:47 UTCEG score recompute
  51. 2026-06-21 16:47 UTCGHSA enrichment
  52. 2026-06-21 14:56 UTCEPSS rescore
  53. 2026-06-21 04:55 UTCEG score recompute
  54. 2026-06-21 04:55 UTCGHSA enrichment
  55. 2026-06-21 01:59 UTCEPSS rescore
  56. 2026-06-20 17:28 UTCEG score recompute
  57. 2026-06-20 17:28 UTCGHSA enrichment
  58. 2026-06-20 05:59 UTCEG score recompute
  59. 2026-06-20 05:59 UTCGHSA enrichment
  60. 2026-06-19 19:26 UTCEPSS rescore
  61. 2026-06-19 17:36 UTCEG score recompute
  62. 2026-06-19 17:36 UTCGHSA enrichment
  63. 2026-06-19 05:58 UTCEG score recompute
  64. 2026-06-19 05:58 UTCGHSA enrichment
  65. 2026-06-18 18:28 UTCEG score recompute
  66. 2026-06-18 18:28 UTCGHSA enrichment
  67. 2026-06-18 17:52 UTCEPSS rescore
  68. 2026-06-18 06:59 UTCEG score recompute
  69. 2026-06-18 06:59 UTCGHSA enrichment
  70. 2026-06-17 18:33 UTCEG score recompute
  71. 2026-06-17 18:33 UTCGHSA enrichment
  72. 2026-06-17 17:53 UTCEPSS rescore
  73. 2026-06-17 07:09 UTCEG score recompute
  74. 2026-06-17 07:09 UTCGHSA enrichment
  75. 2026-06-16 19:43 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-9638?
CVE-2026-9638 is a high vulnerability published on June 12, 2026. Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts. These versions use the built-in rand function, which is predictable and unsuitable for cryptography.
When was CVE-2026-9638 disclosed?
CVE-2026-9638 was first published in the National Vulnerability Database on June 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9638 actively exploited?
CVE-2026-9638 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9638?
CVE-2026-9638 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-9638?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9638, 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.

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