CVE-2026-87520

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.6Exploit: None knownExposed: 0

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

Use after free in Dawn in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS v3
9.6
Vendor severity
HIGHper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: High)
EG Score
9.6(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 22, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/529878021
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html

Vendor Advisories for CVE-2026-87520(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 53× in last 7d / 131× 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 131 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87520?
CVE-2026-87520 is a critical vulnerability published on September 9, 2026. Use after free in Dawn in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-87520 disclosed?
CVE-2026-87520 was first published in the National Vulnerability Database on September 9, 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-2026-87520 actively exploited?
CVE-2026-87520 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 62.7% of all scored CVEs.
What is the CVSS score of CVE-2026-87520?
CVE-2026-87520 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-87520?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87520, 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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