CVE-2026-77384

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: 0.6% (47th percentile of EPSS-scored CVEs). 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
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: 0.6%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

libp2p is a JavaScript implementation of the libp2p networking stack. Prior to version 4.2.9, the reservation refresh path in reservation-store.ts reuses the same retimeableSignal but unconditionally registers another abort listener on every refresh. As a result, a remote peer can repeatedly send valid RESERVE requests for the same reservation, causing unbounded listener and closure growth in @libp2p/circuit-relay-v2 relay servers and leading to denial of service. This issue is fixed in version 4.2.9.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
47th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 24, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 24, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

circuit-relay-v2: v4.2.9

Patch available: libp2p/js-libp2p circuit-relay-v2-v4.2.9

https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9
github_commit Patch Available

commit 4bb8fbe8d3f3 (libp2p/js-libp2p)

Patch available: libp2p/js-libp2p transport-interop-libp2p-main-v1.0.37 (contains commit 4bb8fbe8d3f3)

https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d
githubMentions a patch (unverified)🟡 PoC Available

Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion · Advisory · libp2p/js-libp2p · GitHub

https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× 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. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-10 12:29 UTCEG score recompute
  3. 2026-10-09 20:07 UTCEPSS rescore
  4. 2026-10-09 04:41 UTCEG score recompute
  5. 2026-10-08 17:13 UTCEPSS rescore
  6. 2026-10-08 03:48 UTCEG score recompute
  7. 2026-10-07 23:48 UTCEPSS rescore
  8. 2026-10-06 16:10 UTCEG score recompute
  9. 2026-10-06 15:18 UTCEPSS rescore
  10. 2026-10-06 02:45 UTCEG score recompute
  11. 2026-10-05 17:43 UTCEPSS rescore
  12. 2026-10-05 09:50 UTCEG score recompute
  13. 2026-10-04 23:22 UTCEPSS rescore
  14. 2026-10-03 16:30 UTCEG score recompute
  15. 2026-10-03 14:26 UTCEPSS rescore
  16. 2026-10-03 02:02 UTCEG score recompute
  17. 2026-10-01 22:43 UTCEG score recompute
  18. 2026-10-01 19:50 UTCEPSS rescore
  19. 2026-09-30 20:17 UTCEG score recompute
  20. 2026-09-30 06:58 UTCEG score recompute
  21. 2026-09-29 15:24 UTCEPSS rescore
  22. 2026-09-29 03:26 UTCEG score recompute
  23. 2026-09-28 14:17 UTCEG score recompute
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 01:08 UTCEG score recompute
Show 65 more
  1. 2026-09-27 13:48 UTCEPSS rescore
  2. 2026-09-26 22:16 UTCEG score recompute
  3. 2026-09-26 15:59 UTCEPSS rescore
  4. 2026-09-26 00:28 UTCEPSS rescore
  5. 2026-09-24 18:53 UTCEG score recompute
  6. 2026-09-24 14:04 UTCEPSS rescore
  7. 2026-09-24 04:51 UTCEG score recompute
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 02:33 UTCEG score recompute
  10. 2026-09-22 16:01 UTCEPSS rescore
  11. 2026-09-22 00:15 UTCEG score recompute
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 21:57 UTCEG score recompute
  14. 2026-09-20 20:16 UTCEPSS rescore
  15. 2026-09-19 19:40 UTCEG score recompute
  16. 2026-09-19 06:31 UTCEG score recompute
  17. 2026-09-18 19:28 UTCEPSS rescore
  18. 2026-09-18 04:12 UTCEG score recompute
  19. 2026-09-17 01:54 UTCEG score recompute
  20. 2026-09-16 14:08 UTCEPSS rescore
  21. 2026-09-16 12:45 UTCEG score recompute
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-15 09:39 UTCEG score recompute
  24. 2026-09-15 03:12 UTCEPSS rescore
  25. 2026-09-13 18:05 UTCEG score recompute
  26. 2026-09-12 15:47 UTCEG score recompute
  27. 2026-09-12 15:02 UTCEPSS rescore
  28. 2026-09-12 02:38 UTCEG score recompute
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 13:27 UTCEG score recompute
  31. 2026-09-10 10:25 UTCEG score recompute
  32. 2026-09-10 09:35 UTCEPSS rescore
  33. 2026-09-09 01:21 UTCEG score recompute
  34. 2026-09-08 22:01 UTCEPSS rescore
  35. 2026-09-07 23:33 UTCEG score recompute
  36. 2026-09-06 21:11 UTCEG score recompute
  37. 2026-09-06 13:48 UTCEPSS rescore
  38. 2026-09-05 18:50 UTCEG score recompute
  39. 2026-09-04 16:33 UTCEG score recompute
  40. 2026-09-04 05:07 UTCEPSS rescore
  41. 2026-09-03 00:55 UTCEG score recompute
  42. 2026-09-02 14:12 UTCEPSS rescore
  43. 2026-09-01 22:28 UTCEG score recompute
  44. 2026-09-01 13:54 UTCEPSS rescore
  45. 2026-09-01 09:20 UTCEG score recompute
  46. 2026-09-01 04:40 UTCEPSS rescore
  47. 2026-09-01 04:40 UTCEPSS rescore
  48. 2026-08-31 06:58 UTCEG score recompute
  49. 2026-08-30 19:18 UTCEPSS rescore
  50. 2026-08-30 19:17 UTCEPSS rescore
  51. 2026-08-30 04:40 UTCEG score recompute
  52. 2026-08-30 01:22 UTCEPSS rescore
  53. 2026-08-29 02:22 UTCEG score recompute
  54. 2026-08-28 21:42 UTCEPSS rescore
  55. 2026-08-27 23:58 UTCEG score recompute
  56. 2026-08-27 14:25 UTCEPSS rescore
  57. 2026-08-26 21:39 UTCEG score recompute
  58. 2026-08-26 14:47 UTCEPSS rescore
  59. 2026-08-26 08:31 UTCEG score recompute
  60. 2026-08-25 19:22 UTCEG score recompute
  61. 2026-08-25 19:10 UTCEG score recompute
  62. 2026-08-25 13:49 UTCEPSS rescore
  63. 2026-08-24 22:26 UTCEG score recompute
  64. 2026-08-24 21:18 UTCEG score recompute
  65. 2026-08-24 21:18 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77384?
CVE-2026-77384 is a high vulnerability published on August 24, 2026. libp2p is a JavaScript implementation of the libp2p networking stack. Prior to version 4.2.9, the reservation refresh path in reservation-store.ts reuses the same retimeableSignal but unconditionally registers another abort listener on every refresh. As a result, a remote peer can repeatedly send…
When was CVE-2026-77384 disclosed?
CVE-2026-77384 was first published on August 24, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77384 actively exploited?
CVE-2026-77384 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77384?
CVE-2026-77384 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77384?
A fix for CVE-2026-77384 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-77384

Explore →

Is Your Infrastructure Affected by CVE-2026-77384?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs