CVE-2026-87563

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Origin validation error in Paint 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
4.3
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 9, 2026

Advisory Details (2)

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

Chromium

https://issues.chromium.org/issues/532952073
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-2026-87563(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 24× in last 7d / 44× 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 21:39 UTCEG score recompute
  2. 2026-09-19 21:39 UTCVendor advisory
  3. 2026-09-19 21:39 UTCGHSA enrichment
  4. 2026-09-18 21:31 UTCEG score recompute
  5. 2026-09-18 21:31 UTCVendor advisory
  6. 2026-09-18 21:31 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-17 21:23 UTCEG score recompute
  9. 2026-09-17 21:23 UTCVendor advisory
  10. 2026-09-17 21:23 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-16 21:14 UTCEG score recompute
  13. 2026-09-16 21:14 UTCVendor advisory
  14. 2026-09-16 21:14 UTCGHSA enrichment
  15. 2026-09-16 14:09 UTCEPSS rescore
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 20:50 UTCEG score recompute
  18. 2026-09-15 20:50 UTCVendor advisory
  19. 2026-09-15 20:50 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 20:33 UTCGHSA enrichment
  23. 2026-09-13 20:25 UTCEG score recompute
  24. 2026-09-13 20:25 UTCGHSA enrichment
  25. 2026-09-12 20:17 UTCEG score recompute
Show 19 more
  1. 2026-09-12 20:17 UTCGHSA enrichment
  2. 2026-09-11 20:08 UTCEG score recompute
  3. 2026-09-11 20:08 UTCGHSA enrichment
  4. 2026-09-10 19:38 UTCEG score recompute
  5. 2026-09-10 19:38 UTCGHSA enrichment
  6. 2026-09-09 19:29 UTCEG score recompute
  7. 2026-09-09 19:29 UTCGHSA enrichment
  8. 2026-09-09 16:44 UTCEG score recompute▼ 2.20
  9. 2026-09-09 16:44 UTCGHSA enrichment
  10. 2026-09-09 16:27 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  11. 2026-09-09 15:54 UTCEG score recompute▲ 2.20
  12. 2026-09-09 15:54 UTCGHSA enrichment
  13. 2026-09-09 15:47 UTCNVD update
  14. 2026-09-09 15:27 UTCEG score recompute▼ 2.20
  15. 2026-09-09 15:27 UTCGHSA enrichment
  16. 2026-09-09 15:24 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  17. 2026-09-09 01:22 UTCNVD update
  18. 2026-09-09 00:59 UTCEG score recompute
  19. 2026-09-09 00:57 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-87563?
CVE-2026-87563 is a medium vulnerability published on September 9, 2026. Origin validation error in Paint 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-2026-87563 disclosed?
CVE-2026-87563 was first published in the National Vulnerability Database on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87563 actively exploited?
CVE-2026-87563 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 94.0% of all scored CVEs.
What is the CVSS score of CVE-2026-87563?
CVE-2026-87563 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-87563?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87563, 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

Explore the affected products and dependency analysis for CVE-2026-87563

Explore →

Is Your Infrastructure Affected by CVE-2026-87563?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs