CVE-2026-16376

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week

Also known asEUVD-2026-46212 (ENISA EUVD) · GHSA-h99j-5x2q-c4x4 (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Denial-of-service in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

The CVE record names the fixed release. 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 21, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
Fix named in the CVE record.
Web page

Security Vulnerabilities fixed in Firefox 153 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-68/

Vendor Advisories for CVE-2026-16376(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 45× 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 255 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 155 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-25 14:46 UTCEG score recompute
  7. 2026-10-24 20:27 UTCEG score recompute
  8. 2026-10-24 20:27 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-10-24 08:19 UTCEG score recompute
  11. 2026-10-24 08:19 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  12. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-10-18 04:00 UTCEG score recompute
  19. 2026-10-17 18:04 UTCEG score recompute
  20. 2026-10-17 18:04 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  24. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  25. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 75 more
  1. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  2. 2026-10-12 16:30 UTCEG score recompute
  3. 2026-10-11 20:09 UTCEG score recompute
  4. 2026-10-11 17:21 UTCEG score recompute
  5. 2026-10-11 14:54 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  8. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  9. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  14. 2026-10-04 14:51 UTCEG score recompute
  15. 2026-10-04 14:51 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-10-01 07:33 UTCEG score recompute
  19. 2026-10-01 07:33 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-09-28 06:12 UTCEG score recompute
  24. 2026-09-28 06:12 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  26. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  27. 2026-09-24 03:24 UTCEG score recompute
  28. 2026-09-24 03:24 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-09-23 01:28 UTCEG score recompute
  30. 2026-09-23 01:28 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-09-20 06:05 UTCEG score recompute
  32. 2026-09-20 06:05 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-09-19 00:24 UTCEG score recompute
  34. 2026-09-19 00:24 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  36. 2026-09-18 03:52 UTCEG score recompute
  37. 2026-09-18 03:52 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-09-17 05:07 UTCEG score recompute
  39. 2026-09-17 05:07 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  41. 2026-09-16 12:41 UTCEG score recompute
  42. 2026-09-16 12:41 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  43. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  44. 2026-09-14 03:37 UTCEG score recompute
  45. 2026-09-14 03:37 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  47. 2026-09-13 15:58 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  48. 2026-09-13 03:05 UTCEG score recompute
  49. 2026-09-13 03:05 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  51. 2026-09-12 09:49 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-09-11 20:58 UTCEG score recompute
  53. 2026-09-11 20:58 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  54. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  55. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  56. 2026-09-11 09:10 UTCEG score recompute
  57. 2026-09-11 09:10 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  58. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  59. 2026-09-09 11:38 UTCEG score recompute
  60. 2026-09-09 11:38 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  61. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  62. 2026-09-07 22:43 UTCEG score recompute
  63. 2026-09-07 22:43 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  65. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  66. 2026-09-06 11:07 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-09-05 20:50 UTCEG score recompute
  68. 2026-09-05 20:50 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-09-05 09:11 UTCEG score recompute
  70. 2026-09-05 09:11 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  72. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  73. 2026-09-02 00:59 UTCEG score recompute
  74. 2026-09-02 00:59 UTCGHSA enrichmentGHSA-h99j-5x2q-c4x4 · GitHub severity HIGH · GitHub CVSS 7.5
  75. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile

Frequently asked(5)

What is CVE-2026-16376?
CVE-2026-16376 is a high-severity vulnerability; its CVE record was published on July 21, 2026. Denial-of-service in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
When was the CVE record for CVE-2026-16376 published?
The CVE record for CVE-2026-16376 was published on July 21, 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 October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-16376 actively exploited?
CVE-2026-16376 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16376?
CVE-2026-16376 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16376?
The CVE record for CVE-2026-16376 names the fix: "This vulnerability was fixed in Firefox 153 and Thunderbird 153." The vendor advisories EchelonGraph has for CVE-2026-16376 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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