CVE-2026-26130: Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny s

Q: How do I fix CVE-2026-26130?

asp.net core: upgrade to 8.0.25, 9.0.14, 10.0.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-26130 being exploited?

CVE-2026-26130 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-26130 affect?

CVE-2026-26130 affects asp.net core. Severity is high (CVSS 7.5). Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Q: How urgent is CVE-2026-26130?

Priority 58/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2026-26130 is a high-severity flaw (CVSS 7.5) affecting asp.net core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.0% (top 13%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-03-10
Last modified	2026-07-15

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-07-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-10 18:18 UTCPublished CVE record published
2026-07-15 02:19 UTCUpdated Record last modified

microsoft asp.net core UPGRADE

Affected: >= 8.0.0 and < 8.0.25 · >= 9.0.0 and < 9.0.14 · >= 10.0.0 and < 10.0.4

Fixed in: 8.0.25, 9.0.14, 10.0.4

Safe to downgrade to: a release before 8.0.0

1. Check installed version

apt-cache policy asp.net-core || rpm -q asp.net-core || asp.net-core --version

2. UPGRADE to 8.0.25 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade asp.net-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade asp.net-core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.0.0 (Debian / Ubuntu)

apt-cache madison asp.net-core sudo apt install asp.net-core=<VERSION_BEFORE_8.0.0> sudo apt-mark hold asp.net-core

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list asp.net-core sudo dnf downgrade asp.net-core-<VERSION_BEFORE_8.0.0> sudo dnf versionlock add asp.net-core

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

NuGet (.NET) · Microsoft.AspNetCore.App.Runtime.linux-arm · FIXED · 8.0.25 · vulnerable: >= 8.0.0, <= 8.0.24 · source

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm --version 8.0.25

NuGet (.NET) · Microsoft.AspNetCore.App.Runtime.linux-arm64 · FIXED · 8.0.25 · vulnerable: >= 8.0.0, <= 8.0.24 · source

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm64 --version 8.0.25

Fedora 46 · python-hatchling · FIXED · 1.33.0-1.fc46 · FEDORA-2026-3ccbf17812 · source

sudo dnf upgrade --advisory=FEDORA-2026-3ccbf17812

Fedora ELN · pie · FIXED · 1.5.3-1.eln159 · FEDORA-2026-e009523caa · source

sudo dnf upgrade --advisory=FEDORA-2026-e009523caa

RHEL 10 · dotnet9.0 · FIXED · dotnet9.0-9.0.115-1.el10_1

sudo dnf upgrade --advisory=RHSA-2026:4450 rpm -q dotnet9.0

RHEL 10 · dotnet8.0 · FIXED · dotnet8.0-8.0.125-1.el10_1

sudo dnf upgrade --advisory=RHSA-2026:4451 rpm -q dotnet8.0

RHEL 10 · dotnet10.0 · FIXED · dotnet10.0-10.0.104-1.el10_1

sudo dnf upgrade --advisory=RHSA-2026:4453 rpm -q dotnet10.0

RHEL 10.0 Extended Update Support · dotnet9.0 · FIXED · dotnet9.0-9.0.115-1.el10_0

sudo dnf upgrade --advisory=RHSA-2026:10083 rpm -q dotnet9.0

RHEL 10.0 Extended Update Support · dotnet8.0 · FIXED · dotnet8.0-8.0.125-1.el10_0

sudo dnf upgrade --advisory=RHSA-2026:10091 rpm -q dotnet8.0

Alpine 3.20 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.25-r0

apk add --upgrade dotnet8-runtime apk info -v dotnet8-runtime

Alpine 3.21 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.25-r0

apk add --upgrade dotnet8-runtime apk info -v dotnet8-runtime

Alpine 3.21 · dotnet9-runtime · FIXED · dotnet9-runtime-9.0.14-r0

apk add --upgrade dotnet9-runtime apk info -v dotnet9-runtime

Alpine 3.22 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.25-r0

apk add --upgrade dotnet8-runtime apk info -v dotnet8-runtime

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1506 · source

sudo dnf update --advisory=ALAS2023-2026-1506

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-26130?

asp.net core: upgrade to 8.0.25, 9.0.14, 10.0.4. Exact commands for each OS are on this page.

Is CVE-2026-26130 being exploited?

CVE-2026-26130 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-26130 affect?

CVE-2026-26130 affects asp.net core. Severity is high (CVSS 7.5). Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

How urgent is CVE-2026-26130?

Priority 58/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

.NET vulnerabilities

Related CVEs

CVE-2026-40372 CRITICAL 9.1 UPGRADE Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate pr
CVE-2025-55315 CRITICAL 9.9 UPGRADE UPGRADE Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an aut
CVE-2026-88092 CRITICAL 9.4 UPGRADE UPGRADE Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an una
CVE-2026-69304 MEDIUM 5.9 UPGRADE UPGRADE Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attack
CVE-2025-26682 HIGH 7.5 UPGRADE UPGRADE Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny s

References

← Back to latest CVEs