CVE-2026-87487

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-09-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

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

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

CVSS v3
8.3
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
8.3(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity83% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/495429423
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-2026-87487(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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 43× in last 7d / 95× 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.

  1. 2026-09-25 11:40 UTCVendor advisory
  2. 2026-09-25 11:40 UTCGHSA enrichment
  3. 2026-09-25 00:05 UTCEG score recompute
  4. 2026-09-25 00:05 UTCVendor advisory
  5. 2026-09-25 00:05 UTCGHSA enrichment
  6. 2026-09-24 14:04 UTCEPSS rescore
  7. 2026-09-24 12:25 UTCVendor advisory
  8. 2026-09-24 12:25 UTCGHSA enrichment
  9. 2026-09-24 00:58 UTCEG score recompute
  10. 2026-09-24 00:58 UTCVendor advisory
  11. 2026-09-24 00:58 UTCGHSA enrichment
  12. 2026-09-23 17:54 UTCEPSS rescore
  13. 2026-09-23 13:32 UTCVendor advisory
  14. 2026-09-23 13:32 UTCGHSA enrichment
  15. 2026-09-23 02:06 UTCEG score recompute
  16. 2026-09-23 02:06 UTCVendor advisory
  17. 2026-09-23 02:06 UTCGHSA enrichment
  18. 2026-09-22 16:01 UTCEPSS rescore
  19. 2026-09-22 14:40 UTCVendor advisory
  20. 2026-09-22 14:40 UTCGHSA enrichment
  21. 2026-09-22 03:15 UTCEG score recompute
  22. 2026-09-22 03:15 UTCVendor advisory
  23. 2026-09-22 03:14 UTCGHSA enrichment
  24. 2026-09-21 21:09 UTCEPSS rescore
  25. 2026-09-21 15:48 UTCVendor advisory
Show 70 more
  1. 2026-09-21 15:48 UTCGHSA enrichment
  2. 2026-09-21 04:23 UTCEG score recompute
  3. 2026-09-21 04:23 UTCVendor advisory
  4. 2026-09-21 04:22 UTCGHSA enrichment
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-20 16:56 UTCVendor advisory
  7. 2026-09-20 16:56 UTCGHSA enrichment
  8. 2026-09-20 05:29 UTCVendor advisory
  9. 2026-09-20 05:29 UTCGHSA enrichment
  10. 2026-09-19 18:03 UTCEG score recompute
  11. 2026-09-19 18:03 UTCVendor advisory
  12. 2026-09-19 18:03 UTCGHSA enrichment
  13. 2026-09-19 06:36 UTCEG score recompute
  14. 2026-09-19 06:36 UTCVendor advisory
  15. 2026-09-19 06:36 UTCGHSA enrichment
  16. 2026-09-18 19:28 UTCEPSS rescore
  17. 2026-09-18 19:10 UTCVendor advisory
  18. 2026-09-18 19:10 UTCGHSA enrichment
  19. 2026-09-18 07:42 UTCVendor advisory
  20. 2026-09-18 07:42 UTCGHSA enrichment
  21. 2026-09-17 20:16 UTCEG score recompute
  22. 2026-09-17 20:16 UTCVendor advisory
  23. 2026-09-17 20:16 UTCGHSA enrichment
  24. 2026-09-17 19:32 UTCEPSS rescore
  25. 2026-09-17 08:41 UTCVendor advisory
  26. 2026-09-17 08:41 UTCGHSA enrichment
  27. 2026-09-16 21:15 UTCEG score recompute
  28. 2026-09-16 21:15 UTCVendor advisory
  29. 2026-09-16 21:15 UTCGHSA enrichment
  30. 2026-09-16 14:09 UTCEPSS rescore
  31. 2026-09-16 09:49 UTCEG score recompute
  32. 2026-09-16 09:49 UTCVendor advisory
  33. 2026-09-16 09:49 UTCGHSA enrichment
  34. 2026-09-16 05:15 UTCEPSS rescore
  35. 2026-09-15 22:23 UTCVendor advisory
  36. 2026-09-15 22:23 UTCGHSA enrichment
  37. 2026-09-15 10:56 UTCEG score recompute
  38. 2026-09-15 10:56 UTCVendor advisory
  39. 2026-09-15 10:56 UTCGHSA enrichment
  40. 2026-09-15 03:12 UTCEPSS rescore
  41. 2026-09-15 03:12 UTCEPSS rescore
  42. 2026-09-14 23:29 UTCVendor advisory
  43. 2026-09-14 23:29 UTCGHSA enrichment
  44. 2026-09-14 11:41 UTCGHSA enrichment
  45. 2026-09-14 00:15 UTCEG score recompute
  46. 2026-09-14 00:15 UTCGHSA enrichment
  47. 2026-09-13 12:50 UTCGHSA enrichment
  48. 2026-09-13 01:24 UTCEG score recompute
  49. 2026-09-13 01:24 UTCGHSA enrichment
  50. 2026-09-12 13:58 UTCGHSA enrichment
  51. 2026-09-12 02:32 UTCGHSA enrichment
  52. 2026-09-11 15:05 UTCEG score recompute
  53. 2026-09-11 15:05 UTCGHSA enrichment
  54. 2026-09-11 14:53 UTCEPSS rescore
  55. 2026-09-11 14:53 UTCEPSS rescore
  56. 2026-09-11 03:39 UTCGHSA enrichment
  57. 2026-09-10 16:13 UTCEG score recompute
  58. 2026-09-10 16:13 UTCGHSA enrichment
  59. 2026-09-10 04:35 UTCGHSA enrichment
  60. 2026-09-10 04:03 UTCGHSA enrichment
  61. 2026-09-09 18:28 UTCGHSA enrichment
  62. 2026-09-09 15:59 UTCEG score recompute
  63. 2026-09-09 15:59 UTCGHSA enrichment
  64. 2026-09-09 15:30 UTCGHSA enrichment
  65. 2026-09-09 14:21 UTCEG score recompute▲ 1.80
  66. 2026-09-09 14:21 UTCGHSA enrichment
  67. 2026-09-09 14:20 UTCMITRE cvelistV5CVSS v3 → 8.3 · severity → HIGH
  68. 2026-09-09 01:22 UTCNVD update
  69. 2026-09-09 01:02 UTCEG score recompute
  70. 2026-09-09 00:57 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87487?
CVE-2026-87487 is a high vulnerability published on September 9, 2026. Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
When was CVE-2026-87487 disclosed?
CVE-2026-87487 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-2026-87487 actively exploited?
CVE-2026-87487 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 69.8% of all scored CVEs.
What is the CVSS score of CVE-2026-87487?
CVE-2026-87487 has a CVSS v3.1 base score of 8.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-87487?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87487, 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.

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