Read the docs
TI-2026-82525 Aliases CVE-2026-88078GHSA-hgfw-55vg-gxmm

Spoofing in Microsoft Edge (Chromium-based) via improper signature checks

Priority LOW 20CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Microsoft Edge (Chromium-based) is affected from 1.0.0.0 before 156.0.4314.42. Improper verification of a cryptographic signature (CWE-347) lets an unauthorized remote attacker perform spoofing, and user interaction is required. The flaw has no known exploitation.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00292 21st percentileScored 2026-11-07
Fix Fixed Microsoft Edge (Chromium-based) (Microsoft): 156.0.4314.42

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Edge (Chromium-based)1.0.0.0 to before 156.0.4314.42156.0.4314.42Patch availableCNA
  • Microsoft Edge (Chromium-based) VendorMicrosoft Affected 1.0.0.0 to before 156.0.4314.42 Fixed in 156.0.4314.42 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*before 156.0.4314.42VulnerableMicrosoft
  • cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:* Versions before 156.0.4314.42 Vulnerable ·Microsoft

Remediation

Update Microsoft Edge (Chromium-based) to version 156.0.4314.42 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Microsoft Edge (Chromium-based) (Microsoft) Fixed in 156.0.4314.42

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Spoofing
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Edge (Chromium-based)Fixed 156.0.4314.42 · Security Update

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-88078
  2. 2026-10-29 Alias added: GHSA-hgfw-55vg-gxmm
  3. 2026-10-30 CISA SSVC decision points changed

References

Patch 1

  • TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2022-03781 Out-of-bounds write in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2025-12953 Memory corruption in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2025-04867 Out-of-bounds read in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2024-07384 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 325 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences