CVE-2026-47300high8.8

ASP.NET Core Elevation of Privilege Vulnerability

Impact

ASP.NET Core has an elevation of privilege vulnerability due to incorrect implementation of the authentication algorithm, affecting .NET 8.0-10.0 runtimes and Microsoft Visual Studio 2022 and 2026 versions. An authorized attacker may exploit this over a network. The vulnerability is caused by CWE-303, incorrect implementation of authentication algorithm.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Microsoft · microsoft

.NET 10.0 runtime

1 range

microsoft version evidence

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affected

10.0.0 → before 10.0.10

custom versions

Other versions: unknown

Microsoft · microsoft

.NET 8.0 runtime

1 range

microsoft version evidence

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affected

8.0.0 → before 8.0.29

custom versions

Other versions: unknown

Microsoft · microsoft

.NET 9.0 runtime

1 range

microsoft version evidence

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affected

9.0.0 → before 9.0.18

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Visual Studio 2022 version 17.12

1 range

microsoft version evidence

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affected

17.12.0 → before 17.12.22

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Visual Studio 2022 version 17.14

1 range

microsoft version evidence

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affected

17.14.0 → before 17.14.36

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Visual Studio 2026 version 18.7

1 range

microsoft version evidence

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affected

18.0 → before 18.7.4

custom versions

Other versions: unknown

Original source description

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

Inside the record

Evidence available

Package identity · not supplied

Version evidence

Remediation guidance · not supplied

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-47300

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-303 ↗

CWE-303: Incorrect Implementation of Authentication Algorithm

microsoft

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

microsoft · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*

From (inclusive): 10.0.0

After:

Through (inclusive):

Before: 10.0.10

Vulnerable product

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*

From (inclusive): 8.0.0

After:

Through (inclusive):

Before: 8.0.29

Vulnerable product

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*

From (inclusive): 9.0.0

After:

Through (inclusive):

Before: 9.0.18

Vulnerable product

cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*

From (inclusive): 17.12.0

After:

Through (inclusive):

Before: 17.12.22

Vulnerable product

cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*

From (inclusive): 17.14.0

After:

Through (inclusive):

Before: 17.14.36

Vulnerable product

cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*

From (inclusive): 18.0

After:

Through (inclusive):

Before: 18.7.4

Original applicability statements

[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "10.0.0",
            "versionEndExcluding": "10.0.10"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "8.0.0",
            "versionEndExcluding": "8.0.29"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "9.0.0",
            "versionEndExcluding": "9.0.18"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "17.12.0",
            "versionEndExcluding": "17.12.22"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "17.14.0",
            "versionEndExcluding": "17.14.36"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "18.0",
            "versionEndExcluding": "18.7.4"
          }
        ]
      }
    ]
  }
]

Contributing organizations · 2

microsoft

Assigning organization

2026-10-28

CISA-ADP

Additional data publisher

2026-07-15

What changed

Follow changes

No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

1 sources

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300

vendor-advisorymicrosoft

Priority and evidence

Not in CISA KEVNo package fix recorded

KEV coverage does not rule out exploitation.

KEV checked 31/10/2026, 08:10:34 UTC

microsoft · CVSS:3.1 · 8.8

Assessment vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-07-15

Exploitation: none
Automatable: no
Technical Impact: total

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record details

Published: 14/07/2026, 18:20:12 UTC
Modified: 28/10/2026, 20:01:08 UTC
Last imported by cve.new: 29/10/2026, 14:38:21 UTC
Aliases: None recorded

Source evidence

Request a correction or dispute

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Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-47300

Enrichment coverage

NVDNot fully checked

GHSANot fully checked

EUVDNot fully checked

EPSSNot fully checked

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ASP.NET Core Elevation of Privilege Vulnerability

Impact

Affected packages

Affected products

.NET 10.0 runtime

affected

unaffected

unknown

.NET 8.0 runtime

affected

unaffected

unknown

.NET 9.0 runtime

affected

unaffected

unknown

Microsoft Visual Studio 2022 version 17.12

affected

unaffected

unknown

Microsoft Visual Studio 2022 version 17.14

affected

unaffected

unknown

Microsoft Visual Studio 2026 version 18.7

affected

unaffected

unknown

Original source description

Inside the record

Evidence available

Original records

Underlying weaknesses

Environment requirements

What changed

References