CVE-2026-13863

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

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

Insufficient validation of untrusted input in CustomTabs in Google Chrome on Android prior to 150.0.7871.47 allowed a local attacker to perform privilege escalation via a malicious file. (Chromium security severity: Medium)

CVSS v3
7.8
EG Score
7.8(high)
EPSS
0.9%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 6, 2026

Advisory Details (2)

Auto-updated Jul 2, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/496012495
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html

Vendor Advisories for CVE-2026-13863(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 19× in last 7d / 19× 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. 2026-07-06 20:18 UTCEG score recompute
  2. 2026-07-06 20:18 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 07:17 UTCEG score recompute
  5. 2026-07-06 07:17 UTCGHSA enrichment
  6. 2026-07-05 18:20 UTCEG score recompute
  7. 2026-07-05 18:20 UTCGHSA enrichment
  8. 2026-07-05 05:22 UTCEG score recompute
  9. 2026-07-05 05:22 UTCGHSA enrichment
  10. 2026-07-04 16:25 UTCEG score recompute
  11. 2026-07-04 16:25 UTCGHSA enrichment
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 03:26 UTCEG score recompute▲ 7.80
  14. 2026-07-04 03:26 UTCGHSA enrichment
  15. 2026-07-01 17:06 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-06-30 23:34 UTCEG score recompute
  19. 2026-06-30 23:23 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13863?
CVE-2026-13863 is a high vulnerability published on June 30, 2026. Insufficient validation of untrusted input in CustomTabs in Google Chrome on Android prior to 150.0.7871.47 allowed a local attacker to perform privilege escalation via a malicious file. (Chromium security severity: Medium)
When was CVE-2026-13863 disclosed?
CVE-2026-13863 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13863 actively exploited?
CVE-2026-13863 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-13863?
CVE-2026-13863 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13863?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13863, 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-2026-13863

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