CVE-2026-86550

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-08. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

NuBrowser lacks protocol whitelist validation for the S.browser_fallback_url field of intent://, allowing attackers to inject javascript: URLs via 302 redirects. This results in a universal cross‑site scripting (UXSS) vulnerability that enables script execution within the origin of arbitrary websites.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Sep 8, 2026
No patch confirmed yet.
generic

ZTE Corporation

https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/874505866159006721

Vendor Advisories for CVE-2026-86550(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 20× in last 7d / 55× 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. 2026-09-25 02:53 UTCEG score recompute
  2. 2026-09-25 02:53 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 05:05 UTCEG score recompute
  5. 2026-09-24 05:05 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 07:18 UTCEG score recompute
  8. 2026-09-23 07:18 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 09:30 UTCEG score recompute
  11. 2026-09-22 09:30 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 11:40 UTCEG score recompute
  14. 2026-09-21 11:40 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 13:52 UTCGHSA enrichment
  17. 2026-09-19 16:05 UTCEG score recompute
  18. 2026-09-19 16:05 UTCGHSA enrichment
  19. 2026-09-18 19:28 UTCEPSS rescore
  20. 2026-09-18 18:17 UTCGHSA enrichment
  21. 2026-09-17 20:21 UTCEG score recompute
  22. 2026-09-17 20:21 UTCGHSA enrichment
  23. 2026-09-17 19:32 UTCEPSS rescore
  24. 2026-09-16 22:33 UTCEG score recompute
  25. 2026-09-16 22:33 UTCGHSA enrichment
Show 30 more
  1. 2026-09-16 14:09 UTCEPSS rescore
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-16 00:45 UTCEG score recompute
  4. 2026-09-16 00:45 UTCGHSA enrichment
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-15 02:57 UTCGHSA enrichment
  8. 2026-09-14 05:09 UTCEG score recompute
  9. 2026-09-14 05:09 UTCGHSA enrichment
  10. 2026-09-13 07:22 UTCEG score recompute
  11. 2026-09-13 07:22 UTCGHSA enrichment
  12. 2026-09-12 09:32 UTCEG score recompute
  13. 2026-09-12 09:32 UTCGHSA enrichment
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 11:44 UTCGHSA enrichment
  17. 2026-09-10 13:56 UTCEG score recompute
  18. 2026-09-10 13:56 UTCGHSA enrichment
  19. 2026-09-09 16:08 UTCGHSA enrichment
  20. 2026-09-09 11:26 UTCEG score recompute
  21. 2026-09-09 11:26 UTCGHSA enrichment
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-08 13:38 UTCEG score recompute
  24. 2026-09-08 13:38 UTCGHSA enrichment
  25. 2026-09-08 12:46 UTCEG score recompute
  26. 2026-09-08 12:45 UTCGHSA enrichment
  27. 2026-09-08 09:39 UTCEG score recompute
  28. 2026-09-08 09:39 UTCGHSA enrichment
  29. 2026-09-08 08:35 UTCEG score recompute
  30. 2026-09-08 08:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86550?
CVE-2026-86550 is a medium vulnerability published on September 8, 2026. NuBrowser lacks protocol whitelist validation for the S.browserfallbackurl field of intent://, allowing attackers to inject javascript: URLs via 302 redirects. This results in a universal cross‑site scripting (UXSS) vulnerability that enables script execution within the origin of arbitrary websites.
When was CVE-2026-86550 disclosed?
CVE-2026-86550 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update 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-2026-86550 actively exploited?
CVE-2026-86550 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 62.8% of all scored CVEs.
What is the CVSS score of CVE-2026-86550?
CVE-2026-86550 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-86550?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86550, 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-2026-86550

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