CVE-2026-73561

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.

Hub is a Node.js WebSocket server and client with added features. Prior to 0.2.16, every incoming unauthenticated WebSocket connection triggers loadDefaultConnectionEventListeners to call requestClientId, which calls rpc.send for the get-client-id action and pushes a request into RPC.requests. The RPC.waitForReply function starts a setInterval polling loop every 10 milliseconds that is cleared only after a matching reply; if the client remains silent and closes, the timer and pending request stay allocated because the socket close path does not cancel them. Repeated connections therefore cause unbounded timers and heap entries, exhausting CPU and memory and making the server unavailable. This issue is fixed in version 0.2.16.

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 13, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

GitHub - anephenix/hub at v0.2.16 · GitHub

https://github.com/anephenix/hub/tree/v0.2.16
github_commit

commit 931576db3cdb (anephenix/hub)

Fix landed in anephenix/hub commit 931576db3cdb — awaiting tagged release

https://github.com/anephenix/hub/commit/931576db3cdbf4f1583bd2c3c8759c4f4e032ab3
githubMentions a patch (unverified)🟡 PoC Available

Unauthenticated WebSocket RPC Waiter Resource Exhaustion · Advisory · anephenix/hub · GitHub

https://github.com/anephenix/hub/security/advisories/GHSA-g5vv-q72c-7j78

Vendor Advisories for CVE-2026-73561(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 rangeFix by version rangeDependents
@anephenix/hub—
  • every version up to 0.2.16: fixed in 0.2.16
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× 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.

Showing the most recent 100 of 101 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-07 02:20 UTCEG score recompute
  5. 2026-10-06 15:18 UTCEPSS rescore
  6. 2026-10-06 13:20 UTCEG score recompute
  7. 2026-10-05 17:43 UTCEPSS rescore
  8. 2026-10-05 14:37 UTCEG score recompute
  9. 2026-10-04 23:22 UTCEPSS rescore
  10. 2026-10-03 19:48 UTCEG score recompute
  11. 2026-10-03 14:26 UTCEPSS rescore
  12. 2026-10-02 19:51 UTCEG score recompute
  13. 2026-10-02 07:32 UTCEG score recompute
  14. 2026-10-01 19:50 UTCEPSS rescore
  15. 2026-09-30 21:46 UTCEG score recompute
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 03:52 UTCEG score recompute
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 00:46 UTCEG score recompute
  20. 2026-09-27 13:48 UTCEPSS rescore
  21. 2026-09-27 09:43 UTCEG score recompute
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-25 03:32 UTCEG score recompute
  24. 2026-09-23 21:37 UTCEG score recompute
  25. 2026-09-23 17:54 UTCEPSS rescore
Show 75 more
  1. 2026-09-22 21:00 UTCEG score recompute
  2. 2026-09-22 08:13 UTCEG score recompute
  3. 2026-09-21 21:09 UTCEPSS rescore
  4. 2026-09-21 04:16 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-20 01:49 UTCEG score recompute
  7. 2026-09-19 01:12 UTCEG score recompute
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 00:35 UTCEG score recompute
  10. 2026-09-16 23:59 UTCEG score recompute
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 13:04 UTCEG score recompute
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-13 22:28 UTCEG score recompute
  16. 2026-09-12 21:52 UTCEG score recompute
  17. 2026-09-12 15:02 UTCEPSS rescore
  18. 2026-09-11 21:15 UTCEG score recompute
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-10 18:33 UTCEG score recompute
  21. 2026-09-10 09:35 UTCEPSS rescore
  22. 2026-09-09 04:56 UTCEG score recompute
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-07 16:31 UTCEG score recompute
  25. 2026-09-06 20:35 UTCEG score recompute
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-05 19:54 UTCEG score recompute
  28. 2026-09-04 19:18 UTCEG score recompute
  29. 2026-09-04 06:15 UTCEG score recompute
  30. 2026-09-04 05:07 UTCEPSS rescore
  31. 2026-09-03 01:26 UTCEG score recompute
  32. 2026-09-02 14:12 UTCEPSS rescore
  33. 2026-09-01 23:37 UTCEG score recompute
  34. 2026-09-01 13:54 UTCEPSS rescore
  35. 2026-09-01 11:19 UTCEG score recompute
  36. 2026-09-01 04:40 UTCEPSS rescore
  37. 2026-09-01 04:40 UTCEPSS rescore
  38. 2026-08-30 21:03 UTCEG score recompute
  39. 2026-08-30 19:18 UTCEPSS rescore
  40. 2026-08-30 19:17 UTCEPSS rescore
  41. 2026-08-30 08:44 UTCEG score recompute
  42. 2026-08-30 01:22 UTCEPSS rescore
  43. 2026-08-29 07:33 UTCEG score recompute
  44. 2026-08-28 21:42 UTCEPSS rescore
  45. 2026-08-27 20:44 UTCEG score recompute
  46. 2026-08-27 14:25 UTCEPSS rescore
  47. 2026-08-26 20:02 UTCEG score recompute
  48. 2026-08-26 14:47 UTCEPSS rescore
  49. 2026-08-25 19:23 UTCEG score recompute
  50. 2026-08-25 13:49 UTCEPSS rescore
  51. 2026-08-24 18:46 UTCEG score recompute
  52. 2026-08-23 05:51 UTCEG score recompute
  53. 2026-08-23 00:19 UTCEPSS rescore
  54. 2026-08-22 05:15 UTCEG score recompute
  55. 2026-08-21 23:49 UTCEPSS rescore
  56. 2026-08-21 04:38 UTCEG score recompute
  57. 2026-08-20 22:56 UTCEPSS rescore
  58. 2026-08-20 03:59 UTCEG score recompute
  59. 2026-08-19 17:04 UTCEPSS rescore
  60. 2026-08-18 15:02 UTCEG score recompute
  61. 2026-08-18 13:49 UTCEPSS rescore
  62. 2026-08-18 13:49 UTCEPSS rescore
  63. 2026-08-18 02:21 UTCEG score recompute
  64. 2026-08-18 01:47 UTCEG score recompute
  65. 2026-08-17 20:47 UTCEG score recompute
  66. 2026-08-17 13:47 UTCEPSS rescore
  67. 2026-08-16 20:10 UTCEG score recompute
  68. 2026-08-16 14:56 UTCEPSS rescore
  69. 2026-08-16 14:56 UTCEPSS rescore
  70. 2026-08-16 07:51 UTCEG score recompute
  71. 2026-08-16 02:15 UTCEPSS rescore
  72. 2026-08-15 07:15 UTCEG score recompute
  73. 2026-08-15 01:31 UTCEPSS rescore
  74. 2026-08-13 18:18 UTCEG score recompute
  75. 2026-08-13 17:47 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73561?
CVE-2026-73561 is a high vulnerability published on August 13, 2026. Hub is a Node.js WebSocket server and client with added features. Prior to 0.2.16, every incoming unauthenticated WebSocket connection triggers loadDefaultConnectionEventListeners to call requestClientId, which calls rpc.send for the get-client-id action and pushes a request into RPC.requests. The…
When was CVE-2026-73561 disclosed?
CVE-2026-73561 was first published on August 13, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73561 actively exploited?
CVE-2026-73561 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-2026-73561?
CVE-2026-73561 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-2026-73561?
A fix for CVE-2026-73561 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73561 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73561

Explore →

Is Your Infrastructure Affected by CVE-2026-73561?

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

Book a Demo →Browse All CVEs