CVE-2018-6331

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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.

Buck parser-cache command loads/saves state using Java serialized object. If the state information is maliciously crafted, deserializing it could lead to code execution. This issue affects Buck versions prior to v2018.06.25.01.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation2% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
82.7%
KEV
Not listed

Published

December 31, 2018

Last Modified

May 6, 2025

Advisory Details (1)

Auto-updated May 25, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit 8c5500981812 (facebook/buck)

Patch available: facebook/buck v2018.06.25.01 (contains commit 8c5500981812)

https://github.com/facebook/buck/commit/8c5500981812564877bd122c0f8fab48d3528ddf

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 46× 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. 2026-07-23 01:37 UTCEG score recompute
  2. 2026-07-22 22:17 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-20 17:04 UTCEPSS rescore
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  17. 2026-07-12 19:37 UTCOSV refresh
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  1. 2026-07-06 02:20 UTCEPSS rescore
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  19. 2026-06-24 04:29 UTCOSV refresh
  20. 2026-06-23 21:30 UTCEPSS rescore
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  22. 2026-06-22 14:23 UTCEPSS rescore
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  41. 2026-06-11 13:57 UTCEPSS rescore
  42. 2026-06-10 22:16 UTCEPSS rescore
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  44. 2026-06-08 14:14 UTCEPSS rescore
  45. 2026-06-07 15:22 UTCEPSS rescore
  46. 2026-06-07 15:22 UTCEPSS rescore
  47. 2026-06-07 09:00 UTCOSV refresh
  48. 2026-06-06 13:45 UTCEPSS rescore
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  50. 2026-06-05 22:45 UTCEPSS rescore
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  68. 2026-05-26 07:17 UTCEPSS rescore
  69. 2026-05-26 07:17 UTCEPSS rescore
  70. 2026-05-23 02:44 UTCEG score recompute
  71. 2026-05-23 02:44 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2018-6331?
CVE-2018-6331 is a critical vulnerability published on December 31, 2018. Buck parser-cache command loads/saves state using Java serialized object. If the state information is maliciously crafted, deserializing it could lead to code execution. This issue affects Buck versions prior to v2018.06.25.01.
When was CVE-2018-6331 disclosed?
CVE-2018-6331 was first published in the National Vulnerability Database on December 31, 2018, with the most recent update on May 6, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-6331 actively exploited?
CVE-2018-6331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-6331?
CVE-2018-6331 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-6331?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-6331, 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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