CVE-2026-47300

Aliases:GHSA-8prm-248r-h957
Advisory lineage Upstream: 0 Downstream: 3
PUBLISHED
Published: 14 Jul 2026, 18:20
Last modified:22 Jul 2026, 20:29

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.8 HIGH
v3.1 (cve.org)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

14 Jul 2026, 18:20
Published
Vulnerability first disclosed
22 Jul 2026, 20:29
Last Modified
Vulnerability information updated

Description

Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Techniques & Countermeasures

  • CWE-303•Incorrect Implementation of Authentication Algorithm

    The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

Affected Systems

  • microsoft•microsoft visual studio 2022 version 17.12

    ≥ 17.12.0, < 17.12.22

  • microsoft•microsoft visual studio 2022 version 17.14

    ≥ 17.14.0, < 17.14.36

  • microsoft•microsoft visual studio 2026 version 18.7

    ≥ 18.0, < 18.7.4

  • microsoft•.net 10.0

    ≥ 10.0.0, < 10.0.6 | ≥ 10.0.0, < 10.0.10

  • microsoft•.net 8.0

    ≥ 8.0.0, < 8.0.29

  • microsoft•.net 9.0

    ≥ 9.0.0, < 9.0.18

  • NuGet•Microsoft.AspNetCore.Authentication.Negotiate

    ≥ 10.0.0, < 10.0.10 | ≥ 9.0.0, < 9.0.18 | ≥ 8.0.0, < 8.0.29

References (6)