CVE-2026-45783

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 73% 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, secondary
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.

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUT_VALUE messages whose keys bypass all content validation. No credentials, no prior relationship, and no protocol deviation beyond a crafted key are required. The victim node's datastore fills until the host disk is exhausted, making the node unavailable. This issue has been patched in version 16.2.6.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
27.5%
KEV
Not listed

Published

May 19, 2026

Last Modified

June 11, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes · Advisory · libp2p/js-libp2p · GitHub

https://github.com/libp2p/js-libp2p/security/advisories/GHSA-32mq-hpph-xfvr

Vendor Advisories for CVE-2026-45783(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@libp2p/kad-dht—16.2.6—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 55× 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. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:16 UTCEPSS rescore
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  9. 2026-07-01 15:07 UTCEPSS rescore
  10. 2026-06-30 23:22 UTCEPSS rescore
  11. 2026-06-29 20:41 UTCEG score recompute
  12. 2026-06-29 14:06 UTCEPSS rescore
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  14. 2026-06-28 14:07 UTCEPSS rescore
  15. 2026-06-28 08:52 UTCEG score recompute
  16. 2026-06-28 04:56 UTCEPSS rescore
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  18. 2026-06-27 20:29 UTCEG score recompute
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  20. 2026-06-27 03:08 UTCEPSS rescore
  21. 2026-06-26 19:43 UTCEG score recompute
  22. 2026-06-26 04:51 UTCEG score recompute
  23. 2026-06-25 16:28 UTCEG score recompute
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 14:05 UTCEPSS rescore
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  1. 2026-06-23 21:33 UTCEPSS rescore
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  3. 2026-06-22 14:25 UTCEPSS rescore
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  5. 2026-06-21 14:56 UTCEPSS rescore
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  7. 2026-06-21 01:59 UTCEPSS rescore
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  9. 2026-06-19 19:26 UTCEPSS rescore
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  11. 2026-06-18 17:52 UTCEPSS rescore
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  13. 2026-06-18 00:03 UTCEG score recompute
  14. 2026-06-17 17:53 UTCEPSS rescore
  15. 2026-06-17 11:40 UTCEG score recompute
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  17. 2026-06-16 17:52 UTCEPSS rescore
  18. 2026-06-16 04:55 UTCEG score recompute
  19. 2026-06-15 17:49 UTCEPSS rescore
  20. 2026-06-15 15:58 UTCEG score recompute
  21. 2026-06-15 01:50 UTCEG score recompute
  22. 2026-06-14 13:28 UTCEG score recompute
  23. 2026-06-14 01:05 UTCEG score recompute
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-13 12:38 UTCEG score recompute
  26. 2026-06-12 23:49 UTCEG score recompute
  27. 2026-06-12 23:12 UTCEPSS rescore
  28. 2026-06-12 23:12 UTCEPSS rescore
  29. 2026-06-12 11:26 UTCEG score recompute
  30. 2026-06-11 23:03 UTCEG score recompute
  31. 2026-06-11 14:00 UTCEPSS rescore
  32. 2026-06-11 10:40 UTCEG score recompute
  33. 2026-06-10 22:18 UTCEG score recompute
  34. 2026-06-10 09:55 UTCEG score recompute
  35. 2026-06-09 21:33 UTCEG score recompute
  36. 2026-06-09 09:07 UTCEG score recompute
  37. 2026-06-08 20:44 UTCEG score recompute
  38. 2026-06-08 08:21 UTCEG score recompute
  39. 2026-06-07 19:59 UTCEG score recompute
  40. 2026-06-07 07:37 UTCEG score recompute
  41. 2026-06-06 19:14 UTCEG score recompute
  42. 2026-06-06 06:51 UTCEG score recompute
  43. 2026-06-05 18:29 UTCEG score recompute
  44. 2026-06-05 06:06 UTCEG score recompute
  45. 2026-06-04 17:44 UTCEG score recompute
  46. 2026-06-04 05:21 UTCEG score recompute
  47. 2026-06-03 16:58 UTCEG score recompute
  48. 2026-06-03 04:35 UTCEG score recompute
  49. 2026-06-02 16:12 UTCEG score recompute
  50. 2026-06-02 03:49 UTCEG score recompute
  51. 2026-06-01 15:26 UTCEG score recompute
  52. 2026-06-01 03:04 UTCEG score recompute
  53. 2026-05-24 06:13 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45783?
CVE-2026-45783 is a high vulnerability published on May 19, 2026. libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUT_VALUE messages whose keys bypass all content validation. No…
When was CVE-2026-45783 disclosed?
CVE-2026-45783 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45783 actively exploited?
CVE-2026-45783 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45783?
CVE-2026-45783 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-45783?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45783, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-45783

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