7.5

CVE-2026-56170: ASP.NET Core Denial of Service Vulnerability

Analyzed
AliasesUBUNTU-CVE-2026-56170GHSA-j8gr-8fp3-5q5hBIT-dotnet-2026-56170
Published 14-07-2026Last modified 01-11-2026

Vulnerability summary

CVE-2026-56170 is a high (CVSS 7.5) vulnerability in microsoft .net. EPSS estimates a 1.17% chance of exploitation in the next 30 days, higher than 67.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17
RHSA-2026:26638RHSA-2026:39952RHSA-2026:41893RHSA-2026:41894RHSA-2026:41895RHSA-2026:41896

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 01-11-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.17%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

NuGet12 products
  • Microsoft.AspNetCore.App.Runtime.linux-arm≥ 10.0.0, < 10.0.6 | ≥ 9.0.0, < 9.0.15 | ≥ 8.0.0, < 8.0.26
  • Microsoft.AspNetCore.App.Runtime.linux-arm64≥ 10.0.0, < 10.0.6 | ≥ 9.0.0, < 9.0.15 | ≥ 8.0.0, < 8.0.26
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm≥ 10.0.0, < 10.0.6 | ≥ 9.0.0, < 9.0.15 | ≥ 8.0.0, < 8.0.26
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm64≥ 10.0.0, < 10.0.6 | ≥ 9.0.0, < 9.0.15 | ≥ 8.0.0, < 8.0.26
  • Microsoft.AspNetCore.App.Runtime.linux-musl-x64≥ 10.0.0, < 10.0.6 | ≥ 9.0.0, < 9.0.15 | ≥ 8.0.0, < 8.0.26
Ubuntu5 products
  • dotnet10< 10.0.106-10.0.6-0ubuntu1~24.04.1 | < 10.0.106-10.0.6-0ubuntu1~25.10.1 | < 10.0.107-10.0.7-0ubuntu1~26.04.1
  • dotnet6All versions (No fix recorded)
  • dotnet7All versions (No fix recorded)
  • dotnet8< 8.0.126-8.0.26-0ubuntu1~22.04.1 | < 8.0.126-8.0.26-0ubuntu1~24.04.1 | < 8.0.126-8.0.26-0ubuntu1~25.10.1
  • dotnet9< 9.0.115-9.0.14-0ubuntu1~25.10.1
Microsoft4 products

3 vendors · 21 products

References

9 links