CVE-2026-37630

HIGHNVD 7.37.3
EchelonGraph scoreMEDIUM confidence

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

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-05-11. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated
7.3EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.3Exploit: No code on recordExposed services: Not assessed

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

An issue in QuickJS-NG v.0.12.1 allows an attacker to execute arbitrary code via the js_mapped_arguments_mark function

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
64
EG Risk 64/100

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)
Severity73% × 45%
The EG Score, 7.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (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: No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines at low or medium mission impact and sooner than that at high, and watch for a fix.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines at low or medium mission impact and sooner than that at high, and watch for a fix.

Exploitation public PoC (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

May 11, 2026

Last Modified

May 13, 2026

Advisory Details (1)

Auto-updated Jun 10, 2026
No fix on record yet.
Web page

Use of uninitialized memory in mapped arguments garbage collection · Issue #1400 · quickjs-ng/quickjs · GitHub

https://github.com/quickjs-ng/quickjs/issues/1400

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 26× 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 99 of 246 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 147 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  6. 2026-10-12 16:11 UTCEG score recompute
  7. 2026-10-11 19:53 UTCEG score recompute
  8. 2026-10-11 17:06 UTCEG score recompute
  9. 2026-10-11 14:33 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  19. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
Show 74 more
  1. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-08-23 18:34 UTCEG score recompute
  24. 2026-08-23 18:34 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  25. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-08-17 11:01 UTCEG score recompute
  32. 2026-08-17 11:01 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  33. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  34. 2026-08-16 04:22 UTCEG score recompute
  35. 2026-08-16 04:22 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  36. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  37. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  38. 2026-08-15 00:33 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  39. 2026-08-14 13:43 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  40. 2026-08-14 02:54 UTCEG score recompute
  41. 2026-08-14 02:54 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  42. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  43. 2026-08-13 03:17 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  44. 2026-08-12 16:28 UTCEG score recompute
  45. 2026-08-12 16:28 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  46. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  47. 2026-08-11 15:45 UTCEG score recompute
  48. 2026-08-11 15:45 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  49. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  50. 2026-08-11 01:08 UTCEG score recompute
  51. 2026-08-11 01:08 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  52. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  53. 2026-08-10 11:33 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  54. 2026-08-09 23:50 UTCEG score recompute
  55. 2026-08-09 23:50 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  56. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  57. 2026-08-09 13:01 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  58. 2026-08-09 02:11 UTCEG score recompute
  59. 2026-08-09 02:11 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  60. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  61. 2026-08-08 05:41 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  62. 2026-08-07 18:52 UTCEG score recompute
  63. 2026-08-07 18:52 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  64. 2026-08-07 08:03 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  65. 2026-08-06 19:34 UTCEG score recompute
  66. 2026-08-06 19:34 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  67. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  68. 2026-08-06 08:44 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  69. 2026-08-05 21:55 UTCEG score recompute
  70. 2026-08-05 21:55 UTCGHSA enrichmentGHSA-5m3h-w8g2-q63h · GitHub severity HIGH · GitHub CVSS 7.3
  71. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  72. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  73. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  74. 2026-08-03 19:24 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-37630?
CVE-2026-37630 is a high-severity vulnerability; its CVE record was published on May 11, 2026. An issue in QuickJS-NG v.0.12.1 allows an attacker to execute arbitrary code via the jsmappedarguments_mark function
When was the CVE record for CVE-2026-37630 published?
The CVE record for CVE-2026-37630 was published on May 11, 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 May 13, 2026; the record at its source may have been updated since.
Is CVE-2026-37630 actively exploited?
CVE-2026-37630 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-37630?
CVE-2026-37630 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-37630?
No fix for CVE-2026-37630 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix.

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