CVE-2019-3570

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 30% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

Call to the scrypt_enc() function in HHVM can lead to heap corruption by using specifically crafted parameters (N, r and p). This happens if the parameters are configurable by an attacker for instance by providing the output of scrypt_enc() in a context where Hack/PHP code would attempt to verify it by re-running scrypt_enc() with the same parameters. This could result in information disclosure, memory being overwriten or crashes of the HHVM process. This issue affects versions 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.7.0, 4.8.0, versions 3.30.5 and below, and all versions in the 4.0, 4.1, and 4.2 series.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
74.5%
KEV
Not listed

Published

July 18, 2019

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jul 1, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

HHVM 4.9.0, and security updates for 3.30, and 4.3-4.7 | HHVM

https://hhvm.com/blog/2019/06/10/hhvm-4.9.0.html
github_commit

commit cc331e4349e9 (facebook/hhvm)

Fix landed in facebook/hhvm commit cc331e4349e9 — awaiting tagged release

https://github.com/facebook/hhvm/commit/cc331e4349e91706a673e2a09f1f2ea5bbb33815

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 44× 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. 2026-07-22 14:05 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-20 17:04 UTCEPSS rescore
  5. 2026-07-20 12:32 UTCOSV refresh
  6. 2026-07-19 14:28 UTCEPSS rescore
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  15. 2026-07-13 22:27 UTCEPSS rescore
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  17. 2026-07-12 05:44 UTCEPSS rescore
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  19. 2026-07-11 08:24 UTCEPSS rescore
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  21. 2026-07-09 19:06 UTCEPSS rescore
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  24. 2026-07-06 16:25 UTCEPSS rescore
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  1. 2026-07-06 02:20 UTCEPSS rescore
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  3. 2026-07-05 02:27 UTCEPSS rescore
  4. 2026-07-04 06:28 UTCEPSS rescore
  5. 2026-07-03 07:26 UTCOSV refresh
  6. 2026-07-01 15:03 UTCEPSS rescore
  7. 2026-07-01 15:03 UTCEPSS rescore
  8. 2026-06-30 23:20 UTCEPSS rescore
  9. 2026-06-29 14:03 UTCEPSS rescore
  10. 2026-06-28 14:04 UTCEPSS rescore
  11. 2026-06-28 04:54 UTCEPSS rescore
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  13. 2026-06-27 03:06 UTCEPSS rescore
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  18. 2026-06-23 21:31 UTCEPSS rescore
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  20. 2026-06-22 14:23 UTCEPSS rescore
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  22. 2026-06-21 14:54 UTCEPSS rescore
  23. 2026-06-21 14:54 UTCEPSS rescore
  24. 2026-06-21 01:57 UTCEPSS rescore
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  26. 2026-06-19 19:23 UTCEPSS rescore
  27. 2026-06-19 19:23 UTCEPSS rescore
  28. 2026-06-18 17:50 UTCEPSS rescore
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  30. 2026-06-17 17:50 UTCEPSS rescore
  31. 2026-06-16 17:50 UTCEPSS rescore
  32. 2026-06-15 17:46 UTCEPSS rescore
  33. 2026-06-14 23:15 UTCEPSS rescore
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  35. 2026-06-14 22:13 UTCOSV refresh
  36. 2026-06-13 22:58 UTCEPSS rescore
  37. 2026-06-12 23:09 UTCEPSS rescore
  38. 2026-06-12 23:09 UTCEPSS rescore
  39. 2026-06-11 13:58 UTCEPSS rescore
  40. 2026-06-10 22:16 UTCEPSS rescore
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  42. 2026-06-10 13:19 UTCEPSS rescore
  43. 2026-06-08 14:15 UTCEPSS rescore
  44. 2026-06-08 14:15 UTCEPSS rescore
  45. 2026-06-08 14:15 UTCEPSS rescore
  46. 2026-06-07 15:23 UTCEPSS rescore
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  48. 2026-06-06 13:45 UTCEPSS rescore
  49. 2026-06-06 13:45 UTCEPSS rescore
  50. 2026-06-05 22:45 UTCEPSS rescore
  51. 2026-06-05 06:08 UTCEPSS rescore
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  54. 2026-06-02 20:11 UTCEPSS rescore
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  56. 2026-05-31 22:29 UTCEPSS rescore
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  58. 2026-05-31 00:14 UTCEPSS rescore
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  60. 2026-05-29 13:42 UTCEPSS rescore
  61. 2026-05-28 13:43 UTCEPSS rescore
  62. 2026-05-28 13:43 UTCEPSS rescore
  63. 2026-05-27 17:12 UTCEG score recompute
  64. 2026-05-27 17:12 UTCGHSA enrichment
  65. 2026-05-27 13:39 UTCEPSS rescore
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  67. 2026-05-26 13:42 UTCEPSS rescore
  68. 2026-05-26 07:17 UTCEPSS rescore
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  70. 2026-05-26 07:17 UTCEPSS rescore
  71. 2026-05-24 16:47 UTCEPSS rescore

Frequently asked(5)

What is CVE-2019-3570?
CVE-2019-3570 is a critical vulnerability published on July 18, 2019. Call to the scryptenc() function in HHVM can lead to heap corruption by using specifically crafted parameters (N, r and p). This happens if the parameters are configurable by an attacker for instance by providing the output of scryptenc() in a context where Hack/PHP code would attempt to verify it…
When was CVE-2019-3570 disclosed?
CVE-2019-3570 was first published in the National Vulnerability Database on July 18, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-3570 actively exploited?
CVE-2019-3570 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-3570?
CVE-2019-3570 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-3570?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-3570, 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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