CVE-2026-87455

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 — 4 sources updated this week
9.6EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.6Exploit: None knownExposed services: Not assessed

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

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

CVSS v3
9.6
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
9.6CRITICALhigh confidence
EG Risk
43
EG Risk 43/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 30, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/542565481
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-2026-87455(2)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
chromium113.0.5672.126-1 ... 153.0.8010.47-2~deb13u1 (422 versions)
  • every version up to 153.0.8010.52-1~deb12u1: fixed in 153.0.8010.52-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 153.0.8010.47-2~deb12u1 (185 versions)
  • every version up to 153.0.8010.47-2~deb13u1: fixed in 153.0.8010.47-2~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 152.0.7977.82-1~deb13u1 (183 versions)
  • every version up to 153.0.8010.47-1: fixed in 153.0.8010.47-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 89× in last 7d / 317× 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 317 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87455?
CVE-2026-87455 is a critical vulnerability published on September 9, 2026. Use after free in Aura in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
When was CVE-2026-87455 disclosed?
CVE-2026-87455 was first published 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-2026-87455 actively exploited?
CVE-2026-87455 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-87455?
CVE-2026-87455 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-87455?
No fix for CVE-2026-87455 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-87455 are linked in the Vendor Advisories panel on this page.

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