CVE-2024-21548

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 52% 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Versions of the package bun after 0.0.12 and before 1.1.30 are vulnerable to Prototype Pollution due to improper input sanitization. An attacker can exploit this vulnerability through Bun's APIs that accept objects. Note: This issue relates to the widely known and actively developed 'Bun' JavaScript runtime. The bun package on NPM at versions 0.0.12 and below belongs to a different and older project that happened to claim the 'bun' name in the past.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
50(Track*)
EG Risk 50/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

December 18, 2024

Last Modified

August 19, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
⚠️ Active exploitation confirmed. Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
github_pr

Make prototype pollution attacks harder in most Bun APIs that accept objects

Fix merged in oven-sh/bun PR #14119 on 2024-09-25 — awaiting tagged release

https://github.com/oven-sh/bun/pull/14119
github_commit

commit a234e067a5dc (oven-sh/bun)

Fix landed in oven-sh/bun commit a234e067a5dc — awaiting tagged release

https://github.com/oven-sh/bun/commit/a234e067a5dc7837602df3fb5489e826920cc65a
generic🔴 Active Exploitation

Prototype Pollution in bun | CVE-2024-21548 | Snyk

https://security.snyk.io/vuln/SNYK-JS-BUN-8499549

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
bun—1.1.30—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 25× 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 187 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2024-21548?
CVE-2024-21548 is a high vulnerability published on December 18, 2024. Versions of the package bun after 0.0.12 and before 1.1.30 are vulnerable to Prototype Pollution due to improper input sanitization. An attacker can exploit this vulnerability through Bun's APIs that accept objects. Note: This issue relates to the widely known and actively developed 'Bun'…
When was CVE-2024-21548 disclosed?
CVE-2024-21548 was first published in the National Vulnerability Database on December 18, 2024, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-21548 actively exploited?
CVE-2024-21548 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.2% of all scored CVEs.
What is the CVSS score of CVE-2024-21548?
CVE-2024-21548 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2024-21548?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21548, 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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