CVE-2026-54490

MEDIUMPre-NVD 6.36.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (36th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, if this library is used with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size because the limit is checked against the message frames' length headers, which give the size of the compressed data, not the size after decompression in lib/websocket/driver/hybi.js. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage. This issue is fixed in version 0.7.5.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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 (value × EchelonGraph’s weight)
Severity63% × 45%
The EG Score, 6.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
0.4%
EPSS %ILE
36th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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 none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Resource limit bypass via message compression · Advisory · faye/websocket-driver-node · GitHub

Affected: version 0.7.5, by checking the length of messages

https://github.com/faye/websocket-driver-node/security/advisories/GHSA-mp7j-qc5w-4988
GitHub commit

commit c55679a5b182 (faye/websocket-driver-node)

Fix landed in faye/websocket-driver-node commit c55679a5b182 — awaiting tagged release

https://github.com/faye/websocket-driver-node/commit/c55679a5b18251dd0a55d18a0cc6a4fd8822b92f

Vendor Advisories for CVE-2026-54490(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
node-websocket-driver0.7.4+~cs0.6.14-1, 0.7.4+~cs0.6.7-2, 0.7.5+~cs0.6.14-1
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-websocket-driver0.7.4+~cs0.6.14-1, 0.7.4+~cs0.6.7-2, 0.7.5+~cs0.6.14-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-websocket-driver0.7.4+~cs0.6.14-1, 0.7.4+~cs0.6.7-2
  • every version up to 0.7.5+~cs0.6.14-1: fixed in 0.7.5+~cs0.6.14-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
websocket-driver—
  • every version up to 0.7.5: fixed in 0.7.5
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 126 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 26 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-12 15:56 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:18 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-10-01 12:35 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-09-28 08:40 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 75 more
  1. 2026-09-24 08:45 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-09-23 03:13 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  6. 2026-09-18 04:42 UTCEG score recompute
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  11. 2026-09-14 06:11 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-09-13 07:11 UTCEG score recompute
  14. 2026-09-11 21:43 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  17. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-09-08 00:40 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-09-05 20:45 UTCEG score recompute
  22. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  26. 2026-08-31 02:44 UTCEG score recompute
  27. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  28. 2026-08-30 03:43 UTCEG score recompute
  29. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  30. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  31. 2026-08-27 21:57 UTCEG score recompute
  32. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  33. 2026-08-26 22:57 UTCEG score recompute
  34. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  35. 2026-08-25 23:54 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  37. 2026-08-24 22:44 UTCEG score recompute
  38. 2026-08-23 00:40 UTCEG score recompute
  39. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  40. 2026-08-22 01:40 UTCEG score recompute
  41. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  42. 2026-08-21 02:39 UTCEG score recompute
  43. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  44. 2026-08-20 03:38 UTCEG score recompute
  45. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  46. 2026-08-19 04:16 UTCEG score recompute
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  48. 2026-08-18 05:04 UTCEG score recompute
  49. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  50. 2026-08-17 06:04 UTCEG score recompute
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-08-16 06:54 UTCEG score recompute
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  54. 2026-08-15 07:54 UTCEG score recompute
  55. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  56. 2026-08-14 08:53 UTCEG score recompute
  57. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  58. 2026-08-13 09:53 UTCEG score recompute
  59. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  60. 2026-08-12 10:53 UTCEG score recompute
  61. 2026-08-11 11:52 UTCEG score recompute
  62. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  63. 2026-08-09 13:51 UTCEG score recompute
  64. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  65. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  66. 2026-08-08 14:51 UTCEG score recompute
  67. 2026-08-06 16:50 UTCEG score recompute
  68. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  69. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  70. 2026-08-04 18:49 UTCEG score recompute
  71. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  72. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  73. 2026-08-03 19:48 UTCEG score recompute
  74. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  75. 2026-08-02 20:47 UTCEG score recompute

Related CVEs(same product + same CWE)

Same product

1 shown

Debian:12:node-websocket-driver

Frequently asked(5)

What is CVE-2026-54490?
CVE-2026-54490 is a medium-severity vulnerability; its CVE record was published on July 15, 2026. websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, if this library is used with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size because the limit is checked…
When was the CVE record for CVE-2026-54490 published?
The CVE record for CVE-2026-54490 was published on July 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-54490 actively exploited?
CVE-2026-54490 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54490?
CVE-2026-54490 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54490?
A fix for CVE-2026-54490 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54490 are linked in the Vendor Advisories panel on this page.

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