CVE-2026-16421

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-22. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

Inappropriate implementation in WebAudio in Google Chrome prior to 150.0.7871.182 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS v3
8.8
Vendor severity
HIGHper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: High)
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Jul 24, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/528276487
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0256605430.html

Vendor Advisories for CVE-2026-16421(2)

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:11(1)
PackageVulnerable rangeFixed inDependents
chromium100.0.4896.127-1 ... 99.0.4844.84-1~deb11u1 (500 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium113.0.5672.126-1 ... 150.0.7871.46-1~deb13u1 (390 versions)150.0.7871.181-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 150.0.7871.46-1~deb13u1 (156 versions)150.0.7871.181-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 150.0.7871.46-1~deb13u1 (157 versions)150.0.7871.181-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 118× 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 386 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16421?
CVE-2026-16421 is a high vulnerability published on July 21, 2026. Inappropriate implementation in WebAudio in Google Chrome prior to 150.0.7871.182 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-16421 disclosed?
CVE-2026-16421 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16421 actively exploited?
CVE-2026-16421 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.9% of all scored CVEs.
What is the CVSS score of CVE-2026-16421?
CVE-2026-16421 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16421?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16421, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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