CVE-2026-58649

Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-25)

CWE

CWE-346

Published

2026-09-08

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• microsoft:.net
• microsoft:.net_sdk
• microsoft:visual_studio_2022
• microsoft:visual_studio_2026

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58649

Check your stackJSON