Skip to content
Fencer Vulns
medium 5.9

CVE-2026-70162 json

.NET Denial of Service Vulnerability

published 2026-10-13 26 d ago modified 2026-10-31 8 d ago also GHSA-2fmv-rv2c-59x7 , EUVD-2026-100402

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

A denial of service vulnerability exists when Microsoft Common Object Runtime Library improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET web application. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET application. The update addresses the vulnerability by correcting how the .NET web application handles web requests.

Patch / fix

  • nuget System.Security.Cryptography.Pkcs 8.0.2, 9.0.21, 10.0.13, 11.0.0-rc.2
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.42
  • Microsoft Microsoft Visual Studio 2026 version 18.10 18.10.4
  • Microsoft System.Security.Cryptography.Pkcs 10.0.13
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.32-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 9.0.21-r0
  • dotnet10-runtime Alpine 3.24, Alpine 3.23 10.0.13-r0

alpine advisories ALPINE-CVE-2026-70162

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-70162 updated cvss 5.9

dotnet: dotnet: Denial of Service via specially crafted web requests

  • Red Hat Hardened Images dotnet8.0 8.0.132-0.1.hum1, dotnet-sdk-8.0 8.0.132-0.1.hum1, dotnet-hostfxr-8.0 8.0.32-0.1.hum1, dotnet-runtime-8.0 8.0.32-0.1.hum1, dotnet-sdk-dbg-8.0 8.0.132-0.1.hum1, dotnet-templates-8.0 8.0.132-0.1.hum1, +7 more
    fixed: vendor fix RHSA-2026:84693

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
26 d ago

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
nuget System.Security.Cryptography.Pkcs
>=10.0.0, <10.0.13
>=11.0.0-preview.1, <11.0.0-rc.2
>=8.0.0, <8.0.2
>=9.0.0, <9.0.21
10.0.13
11.0.0-rc.2
8.0.2
9.0.21

Affected products

  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.10
  • Microsoft System.Security.Cryptography.Pkcs

Classification

Weakness
  • CWE-405 Asymmetric Resource Consumption (Amplification)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.