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TI-2026-49165 Aliases CVE-2026-70351GHSA-j24m-jgmw-jc5f

Microsoft WebP Image Extension Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-122Published · Updated

Key facts

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

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

Summary

Integer overflow or wraparound in Microsoft WebP Image Extension allows an unauthorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00819 57th percentileScored 2026-11-07
Fix Fixed WebP Image Extension (Microsoft): 1.2.31.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWebP Image Extension1.0.0.0 to before 1.2.31.01.2.31.0Patch availableCNA
  • WebP Image Extension VendorMicrosoft Affected 1.0.0.0 to before 1.2.31.0 Fixed in 1.2.31.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:webp_image_extension:*:*:*:*:*:*:*:*before 1.2.31.0VulnerableMicrosoft
  • cpe:2.3:a:microsoft:webp_image_extension:*:*:*:*:*:*:*:* Versions before 1.2.31.0 Vulnerable ·Microsoft

Remediation

  • Fix · CNA WebP Image Extension (Microsoft) Fixed in 1.2.31.0

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely
ProductStatusPlan or fix
WebP Image ExtensionFixed 1.2.31.0 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-70351
  2. 2026-10-03 Alias added: GHSA-j24m-jgmw-jc5f

References

Patch 1

  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2020-13080 WebP Image Extensions Information Disclosure Vulnerability CVSS 3.1MEDIUM 5.5

Sources

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