CVE-2026-87539

LOWPre-NVD 3.13.1—
EchelonGraph scoreHIGH confidence

Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-09-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 3.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
3.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.1Exploit: None knownExposed: 0

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

Observable discrepancy in Network in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

CVSS v3
3.1
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
3.1(high)
EG Risk
14(Track)
EG Risk 14/100SSVC: 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
Severity31% × 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

References (2)

Vendor Advisories for CVE-2026-87539(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 14× in last 7d / 30× 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. 2026-09-19 03:31 UTCEG score recompute
  2. 2026-09-19 03:31 UTCVendor advisory
  3. 2026-09-19 03:31 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 08:55 UTCEG score recompute
  8. 2026-09-16 08:55 UTCVendor advisory
  9. 2026-09-16 08:55 UTCGHSA enrichment
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-13 13:34 UTCEG score recompute
  14. 2026-09-13 13:34 UTCGHSA enrichment
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-10 18:58 UTCEG score recompute
  18. 2026-09-10 18:58 UTCGHSA enrichment
  19. 2026-09-09 16:46 UTCEG score recompute▼ 3.40
  20. 2026-09-09 16:46 UTCGHSA enrichment
  21. 2026-09-09 16:27 UTCNVD updateCVSS v3 → 3.1 · severity → LOW
  22. 2026-09-09 15:56 UTCEG score recompute▲ 3.40
  23. 2026-09-09 15:56 UTCGHSA enrichment
  24. 2026-09-09 15:47 UTCNVD update
  25. 2026-09-09 15:30 UTCEG score recompute▼ 3.40
Show 5 more
  1. 2026-09-09 15:30 UTCGHSA enrichment
  2. 2026-09-09 15:24 UTCMITRE cvelistV5CVSS v3 → 3.1 · severity → LOW
  3. 2026-09-09 01:22 UTCNVD update
  4. 2026-09-09 01:01 UTCEG score recompute
  5. 2026-09-09 00:57 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-87539?
CVE-2026-87539 is a low vulnerability published on September 9, 2026. Observable discrepancy in Network in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
When was CVE-2026-87539 disclosed?
CVE-2026-87539 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-2026-87539 actively exploited?
CVE-2026-87539 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 87.8% of all scored CVEs.
What is the CVSS score of CVE-2026-87539?
CVE-2026-87539 has a CVSS v3.1 base score of 3.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-87539?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87539, 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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