CVE-2026-87534

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-09. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Missing authorization in WebView in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass system access restrictions via crafted network traffic. (Chromium security severity: Medium)

CVSS v3
9.8
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
9.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 17, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/513134173
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-2026-87534(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 54× in last 7d / 87× 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. 2026-09-20 06:02 UTCGHSA enrichment
  2. 2026-09-20 01:59 UTCGHSA enrichment
  3. 2026-09-19 21:56 UTCGHSA enrichment
  4. 2026-09-19 17:53 UTCEG score recompute
  5. 2026-09-19 17:53 UTCGHSA enrichment
  6. 2026-09-19 13:50 UTCGHSA enrichment
  7. 2026-09-19 09:45 UTCGHSA enrichment
  8. 2026-09-19 05:26 UTCGHSA enrichment
  9. 2026-09-19 01:23 UTCGHSA enrichment
  10. 2026-09-18 21:20 UTCEG score recompute
  11. 2026-09-18 21:20 UTCGHSA enrichment
  12. 2026-09-18 19:28 UTCEPSS rescore
  13. 2026-09-18 16:30 UTCGHSA enrichment
  14. 2026-09-18 12:27 UTCGHSA enrichment
  15. 2026-09-18 08:24 UTCGHSA enrichment
  16. 2026-09-18 04:21 UTCGHSA enrichment
  17. 2026-09-18 00:18 UTCGHSA enrichment
  18. 2026-09-17 20:15 UTCEG score recompute
  19. 2026-09-17 20:15 UTCGHSA enrichment
  20. 2026-09-17 19:32 UTCEPSS rescore
  21. 2026-09-17 15:02 UTCGHSA enrichment
  22. 2026-09-17 10:59 UTCGHSA enrichment
  23. 2026-09-17 06:56 UTCGHSA enrichment
  24. 2026-09-17 02:53 UTCGHSA enrichment
  25. 2026-09-16 22:25 UTCGHSA enrichment
Show 62 more
  1. 2026-09-16 18:13 UTCEG score recompute
  2. 2026-09-16 18:13 UTCGHSA enrichment
  3. 2026-09-16 14:09 UTCEPSS rescore
  4. 2026-09-16 13:53 UTCGHSA enrichment
  5. 2026-09-16 09:39 UTCGHSA enrichment
  6. 2026-09-16 05:35 UTCEG score recompute
  7. 2026-09-16 05:35 UTCGHSA enrichment
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-16 01:33 UTCGHSA enrichment
  10. 2026-09-15 21:30 UTCGHSA enrichment
  11. 2026-09-15 17:27 UTCGHSA enrichment
  12. 2026-09-15 13:24 UTCGHSA enrichment
  13. 2026-09-15 09:21 UTCGHSA enrichment
  14. 2026-09-15 05:18 UTCEG score recompute
  15. 2026-09-15 05:17 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 01:13 UTCGHSA enrichment
  19. 2026-09-14 21:10 UTCGHSA enrichment
  20. 2026-09-14 17:02 UTCGHSA enrichment
  21. 2026-09-14 12:58 UTCGHSA enrichment
  22. 2026-09-14 08:55 UTCGHSA enrichment
  23. 2026-09-14 04:53 UTCGHSA enrichment
  24. 2026-09-14 00:50 UTCGHSA enrichment
  25. 2026-09-13 20:47 UTCEG score recompute
  26. 2026-09-13 20:47 UTCGHSA enrichment
  27. 2026-09-13 16:44 UTCGHSA enrichment
  28. 2026-09-13 12:41 UTCGHSA enrichment
  29. 2026-09-13 08:38 UTCGHSA enrichment
  30. 2026-09-13 04:35 UTCGHSA enrichment
  31. 2026-09-13 00:32 UTCGHSA enrichment
  32. 2026-09-12 20:29 UTCGHSA enrichment
  33. 2026-09-12 16:26 UTCEG score recompute
  34. 2026-09-12 16:26 UTCGHSA enrichment
  35. 2026-09-12 12:23 UTCGHSA enrichment
  36. 2026-09-12 08:19 UTCGHSA enrichment
  37. 2026-09-12 04:17 UTCGHSA enrichment
  38. 2026-09-12 00:14 UTCGHSA enrichment
  39. 2026-09-11 20:11 UTCGHSA enrichment
  40. 2026-09-11 16:08 UTCEG score recompute
  41. 2026-09-11 16:08 UTCGHSA enrichment
  42. 2026-09-11 14:53 UTCEPSS rescore
  43. 2026-09-11 14:53 UTCEPSS rescore
  44. 2026-09-11 11:58 UTCEG score recompute
  45. 2026-09-11 11:58 UTCGHSA enrichment
  46. 2026-09-11 07:55 UTCGHSA enrichment
  47. 2026-09-11 03:52 UTCGHSA enrichment
  48. 2026-09-10 23:49 UTCEG score recompute
  49. 2026-09-10 23:49 UTCGHSA enrichment
  50. 2026-09-10 19:19 UTCGHSA enrichment
  51. 2026-09-10 18:39 UTCEG score recompute▲ 3.30
  52. 2026-09-10 18:39 UTCGHSA enrichment
  53. 2026-09-10 18:37 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  54. 2026-09-10 18:25 UTCEG score recompute
  55. 2026-09-10 18:25 UTCGHSA enrichment
  56. 2026-09-10 18:24 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  57. 2026-09-10 13:44 UTCEG score recompute
  58. 2026-09-10 13:44 UTCGHSA enrichment
  59. 2026-09-09 15:56 UTCGHSA enrichment
  60. 2026-09-09 01:22 UTCNVD update
  61. 2026-09-09 01:01 UTCEG score recompute
  62. 2026-09-09 00:57 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87534?
CVE-2026-87534 is a critical vulnerability published on September 9, 2026. Missing authorization in WebView in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass system access restrictions via crafted network traffic. (Chromium security severity: Medium)
When was CVE-2026-87534 disclosed?
CVE-2026-87534 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-2026-87534 actively exploited?
CVE-2026-87534 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 88.0% of all scored CVEs.
What is the CVSS score of CVE-2026-87534?
CVE-2026-87534 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-87534?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87534, 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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