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NVD / CVE Program· CNA microsoft

CVE-2026-88092: ASP.NET Core Tampering Vulnerability

CriticalCVSS 9.4 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 37/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.93% (FIRST EPSS); higher than 61.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: ASP.NET Core 10.0 10.0.13; ASP.NET Core 11.0 11.0.0-rc.2; ASP.NET Core 8.0 8.0.32.

Low priority for now. Upgrade to ASP.NET Core 10.0 10.0.13; ASP.NET Core 11.0 11.0.0-rc.2; ASP.NET Core 8.0 8.0.32 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.

Published
Oct 13, 2026
Updated
Nov 10, 2026
EPSS
0.9% · 61th percentile

Report tools

JSON

Action score

37

Monitor

Low priority for now.

CVSS
37 / 40 · 9.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
9.4
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-88092

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftasp.net core
microsoftvisual studio 2022
microsoftvisual studio 2026

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft ASP.NET Core 10.0

    • 10.0 and later · before 10.0.13affected

  • Microsoft ASP.NET Core 11.0

    • 11.0 and later · before 11.0.0-rc.2affected

  • Microsoft ASP.NET Core 8.0

    • 8.0 and later · before 8.0.32affected

  • Microsoft ASP.NET Core 9.0

    • 9.0 and later · before 9.0.21affected

  • Microsoft Microsoft Visual Studio 2022 version 17.14

    • 17.14.0 and later · before 17.14.42affected

  • Microsoft Microsoft Visual Studio 2026 version 18.10

    • 18.10.0 and later · before 18.10.4affected
Affected versions · NVD (7)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft asp.net core8.0.0 and later · before 8.0.32
  • microsoft asp.net core9.0.0 and later · before 9.0.21
  • microsoft asp.net core10.0.0 and later · before 10.0.13
  • microsoft asp.net coreafter 11.0.0
  • microsoft asp.net core11.0
  • microsoft visual studio 202217.14.0 and later · before 17.14.42
  • microsoft visual studio 202618.10.0 and later · before 18.10.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10aspnetcore-runtime-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-runtime-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10aspnetcore-runtime-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-apphost-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-apphost-pack-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-apphost-pack-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-hostbefore 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-hostfxr-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-hostfxr-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-hostfxr-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-runtime-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-runtime-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-runtime-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-sdk-10.0before 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:10dotnet-sdk-10.0-source-built-artifactsbefore 10.0.113-1.el10_210.0.113-1.el10_2

+96

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-55315ASP.NET Security Feature Bypass Vulnerability
    59Plan
  • CVE-2020-0603A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in memory.An attacker who…
    42Plan
  • CVE-2026-40372ASP.NET Core Elevation of Privilege Vulnerability
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-26130Mar 10, 2026 · ASP.NET Core Denial of Service Vulnerability
    31Monitor
  • ← EarlierCVE-2026-45591Jun 9, 2026 · ASP.NET Core Denial of Service Vulnerability
    31Monitor
  • ← EarlierCVE-2026-69304Sep 8, 2026 · ASP.NET Core Denial of Service Vulnerability
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
ASP.NET Core 10.010.0.13 · KB5130036Microsoft (MSRC)
ASP.NET Core 11.011.0.0-rc.2 · Release NotesMicrosoft (MSRC)
ASP.NET Core 8.08.0.32 · KB5130034Microsoft (MSRC)
ASP.NET Core 9.09.0.21 · KB5130035Microsoft (MSRC)
Microsoft Visual Studio 2022 version 17.1417.14.42 · Release NotesMicrosoft (MSRC)
Microsoft Visual Studio 2026 version 18.1018.10.4 · Release NotesMicrosoft (MSRC)
almalinux:aspnetcore-runtime-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:aspnetcore-runtime-dbg-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:aspnetcore-targeting-pack-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-apphost-pack-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-hostfxr-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-runtime-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-runtime-dbg-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-sdk-8.08.0.132-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-sdk-8.0-source-built-artifacts8.0.132-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-sdk-dbg-8.08.0.132-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-targeting-pack-8.08.0.32-1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:dotnet-templates-8.08.0.132-1.el10_2 · AlmaLinux:10Package registry (OSV)
alpine:dotnet10-runtime10.0.13-r0 · Alpine:v3.23Package registry (OSV)
alpine:dotnet8-runtime8.0.32-r0 · Alpine:v3.22Package registry (OSV)
alpine:dotnet9-runtime9.0.21-r0 · Alpine:v3.22Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm10.0.13Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm11.0.0-rc.2Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm8.0.32Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm9.0.21Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm6410.0.13Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm6411.0.0-rc.2Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm648.0.32Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm649.0.21Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm10.0.13Package registry (OSV)

+38

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 12, 2026+30 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-55315364 days apartASP.NET Security Feature Bypass Vulnerability
    59Plan

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
Low

Weakness class (CWE)

CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records