CVE-2026-84356

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-02. 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.

UI misrepresentation in FullScreen in Google Chrome prior to 152.0.7977.75 allowed a remote attacker to spoof address bar via a crafted HTML page. (Chromium security severity: Low)

CVSS v3
4.3
Vendor severity
LOWper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Low)
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
5%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 17, 2026

Advisory Details (2)

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

Chromium

https://issues.chromium.org/issues/503787232
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop.html

Vendor Advisories for CVE-2026-84356(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 rangeFixed inDependents
chromium113.0.5672.126-1 ... 152.0.7977.64-1 (412 versions)152.0.7977.75-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 152.0.7977.75-1~deb12u1 (178 versions)152.0.7977.75-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 152.0.7977.75-1~deb13u1 (180 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 59× 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. 2026-09-18 19:31 UTCEG score recompute
  2. 2026-09-18 19:31 UTCVendor advisory
  3. 2026-09-18 19:31 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 19:20 UTCVendor advisory
  7. 2026-09-17 19:20 UTCGHSA enrichment
  8. 2026-09-17 00:52 UTCEG score recompute
  9. 2026-09-17 00:52 UTCVendor advisory
  10. 2026-09-17 00:52 UTCGHSA enrichment
  11. 2026-09-16 14:09 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-16 00:43 UTCEG score recompute
  14. 2026-09-16 00:43 UTCVendor advisory
  15. 2026-09-16 00:43 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 00:28 UTCVendor advisory
  19. 2026-09-15 00:28 UTCGHSA enrichment
  20. 2026-09-14 00:19 UTCEG score recompute
  21. 2026-09-14 00:19 UTCVendor advisory
  22. 2026-09-14 00:19 UTCGHSA enrichment
  23. 2026-09-13 00:11 UTCEG score recompute
  24. 2026-09-13 00:11 UTCVendor advisory
  25. 2026-09-13 00:11 UTCGHSA enrichment
Show 34 more
  1. 2026-09-12 00:02 UTCEG score recompute
  2. 2026-09-12 00:02 UTCVendor advisory
  3. 2026-09-12 00:02 UTCGHSA enrichment
  4. 2026-09-10 23:53 UTCEG score recompute
  5. 2026-09-10 23:53 UTCGHSA enrichment
  6. 2026-09-09 23:34 UTCGHSA enrichment
  7. 2026-09-08 23:16 UTCVendor advisory
  8. 2026-09-08 23:16 UTCGHSA enrichment
  9. 2026-09-07 18:24 UTCEG score recompute
  10. 2026-09-07 18:24 UTCVendor advisory
  11. 2026-09-07 18:23 UTCGHSA enrichment
  12. 2026-09-06 18:15 UTCEG score recompute
  13. 2026-09-06 18:15 UTCVendor advisory
  14. 2026-09-06 18:15 UTCGHSA enrichment
  15. 2026-09-06 13:48 UTCEPSS rescore
  16. 2026-09-05 18:06 UTCEG score recompute
  17. 2026-09-05 18:06 UTCVendor advisory
  18. 2026-09-05 18:06 UTCGHSA enrichment
  19. 2026-09-05 15:31 UTCEPSS rescore
  20. 2026-09-04 17:52 UTCEG score recompute
  21. 2026-09-04 17:52 UTCVendor advisory
  22. 2026-09-04 17:52 UTCGHSA enrichment
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-03 17:39 UTCGHSA enrichment
  25. 2026-09-03 16:55 UTCEG score recompute
  26. 2026-09-03 16:55 UTCGHSA enrichment
  27. 2026-09-02 19:32 UTCGHSA enrichment
  28. 2026-09-02 18:55 UTCEG score recompute▼ 1.10
  29. 2026-09-02 18:55 UTCGHSA enrichment
  30. 2026-09-02 18:50 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  31. 2026-09-02 14:12 UTCEPSS rescore
  32. 2026-09-02 00:22 UTCNVD update
  33. 2026-09-01 23:50 UTCEG score recompute
  34. 2026-09-01 23:50 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84356?
CVE-2026-84356 is a medium vulnerability published on September 1, 2026. UI misrepresentation in FullScreen in Google Chrome prior to 152.0.7977.75 allowed a remote attacker to spoof address bar via a crafted HTML page. (Chromium security severity: Low)
When was CVE-2026-84356 disclosed?
CVE-2026-84356 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84356 actively exploited?
CVE-2026-84356 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 95.0% of all scored CVEs.
What is the CVSS score of CVE-2026-84356?
CVE-2026-84356 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84356?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84356, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-84356

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