LiveActive security incident?Get immediate response
CVE Record

CVE-2026-26130: ASP.NET Core Denial of Service Vulnerability

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

HighCVSS 7.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This is a high-severity availability issue in ASP.NET Core. A remote, unauthenticated attacker could cause affected services to consume excessive resources and become unavailable. The sources identify vendor patches, but do not provide exploit details or name active attacks.

Executive priority

Treat this as a prompt patching item for externally reachable ASP.NET Core services. It affects availability, not data confidentiality or integrity, but downtime could still create material operational impact.

Technical view

CVE-2026-26130 is CWE-770: allocation of resources without limits or throttling in ASP.NET Core 8.0, 9.0, and 10.0. CVSS 3.1 is 7.5: network-accessible, low complexity, no privileges, no user interaction, availability impact only.

Likely exposure

Organizations running network-reachable ASP.NET Core applications on affected 8.0, 9.0, or 10.0 components are the likely exposure set. Internet-facing APIs and services carry higher business risk.

Exploitation context

The provided bundle marks KEV as false, and the CVSS temporal metric lists exploit maturity as unproven. No cited source in the bundle states active exploitation.

Researcher notes

The public bundle describes the weakness class and affected major versions, but not the vulnerable code path, triggering condition, or fixed build numbers. Avoid assuming exploitability beyond the stated network DoS impact.

Mitigation direction

  • Apply Microsoft updates for affected ASP.NET Core versions.
  • Apply relevant Red Hat errata where Red Hat packages are used.
  • Prioritize internet-facing ASP.NET Core services first.
  • Check vendor advisories for version-specific remediation details.
  • Monitor availability and resource consumption during rollout.

Validation and detection

  • Inventory ASP.NET Core runtime, SDK, and deployed application versions.
  • Identify services using ASP.NET Core 8.0, 9.0, or 10.0.
  • Compare installed versions against Microsoft and Red Hat advisories.
  • Confirm patched versions after maintenance completes.
  • Review monitoring for resource exhaustion or denial-of-service symptoms.
Prepared
Confidence
high
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-770: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-26130 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
19Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C3.93.6microsoft
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2026-26130Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPasp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation
other:Red Hat severity ratingcvssV3_1
  • 2026-03-10T18:04:33.162Z: Reported to Red Hat.
  • 2026-03-10T17:05:22.367Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MicrosoftASP.NET Core 10.010.0Listed
MicrosoftASP.NET Core 8.08.0Listed
MicrosoftASP.NET Core 9.09.0Listed
Weakness

CWE details

CWE-770

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-770 · source CWE mapping

Allocation of Resources Without Limits or Throttling

Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs