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Fencer Vulns
medium 6.5

CVE-2026-62902 json

.NET Information Disclosure Vulnerability

published 2026-08-11 2 mo ago modified 2026-10-30 9 d ago also BIT-dotnet-2026-62902 , BIT-dotnet-sdk-2026-62902 , EUVD-2026-56410 , GHSA-9mrh-pw7c-9mqm

cvss
6.5
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

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

Patch / fix

  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.30, 9.0.19, 10.0.11
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.30, 9.0.19, 10.0.11
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.30, 9.0.19, 10.0.11
  • bitnami dotnet 8.0.30, 9.0.19
  • bitnami dotnet-sdk 8.0.30, 9.0.19
  • Microsoft .NET 8.0 runtime 8.0.30
  • Microsoft .NET 9.0 runtime 9.0.19
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.38
  • Microsoft Microsoft Visual Studio 2026 version 18.8 18.8.3
  • dotnet8.0 hummingbird 1 8.0.130-0.1.hum1
  • dotnet-sdk-8.0 hummingbird 1 8.0.130-0.1.hum1
  • dotnet-hostfxr-8.0 hummingbird 1 8.0.30-0.1.hum1
  • dotnet-runtime-8.0 hummingbird 1 8.0.30-0.1.hum1
  • dotnet-sdk-dbg-8.0 hummingbird 1 8.0.130-0.1.hum1
  • dotnet-templates-8.0 hummingbird 1 8.0.130-0.1.hum1
  • aspnetcore-runtime-8.0 hummingbird 1 8.0.30-0.1.hum1
  • dotnet-runtime-dbg-8.0 hummingbird 1 8.0.30-0.1.hum1

red hat advisories RHSA-2026:55405RHSA-2026:44914

  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.31-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 9.0.20-r0
  • dotnet10-runtime Alpine 3.23 10.0.13-r0
  • dotnet10-runtime Alpine 3.24 10.0.12-r0

alpine advisories ALPINE-CVE-2026-62902

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-2026-62902 updated cvss 6.5

dotnet: .NET: Information Disclosure Vulnerability

  • Red Hat Hardened Images dotnet9.0 9.0.119-2.hum1, dotnet8.0 8.0.130-0.1.hum1, dotnet-sdk-9.0 9.0.119-2.hum1, dotnet-sdk-8.0 8.0.130-0.1.hum1, dotnet-sdk-aot-9.0 9.0.119-2.hum1, dotnet-sdk-dbg-9.0 9.0.119-2.hum1, +6 more
    fixed: vendor fix “No mitigation is needed. All shipped versions of .NET in Red Hat products already contain the fix for this vulnerability.” RHSA-2026:55405
  • Red Hat Enterprise Linux 8 dotnet, dotnet8.0, dotnet9.0, dotnet/sdk, dotnet10.0, dotnet-host, +39 more Red Hat Enterprise Linux 9 dotnet6.0, dotnet7.0, dotnet8.0, dotnet9.0, dotnet/sdk, dotnet10.0, +59 more Red Hat Enterprise Linux 10 dotnet8.0, dotnet9.0, dotnet10.0, dotnet11.0 Red Hat Hardened Images dotnet10.0, dotnet-hostfxr-9.0 9.0.18-2.hum1, dotnet-runtime-9.0 9.0.18-2.hum1, dotnet-hostfxr-8.0 8.0.30-0.1.hum1, dotnet-runtime-8.0 8.0.30-0.1.hum1, aspnetcore-runtime-9.0 9.0.18-2.hum1, +11 more Red Hat OpenShift Dev Spaces devspaces/udi-rhel9
    not affected: vulnerable code not present

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
2 mo ago

Exploit prediction

0.87% 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 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64
>=10.0.0, <10.0.11
>=9.0.0, <9.0.19
>=8.0.0, <8.0.30
10.0.11
9.0.19
8.0.30
nuget Microsoft.WindowsDesktop.App.Runtime.win-x64
>=10.0.0, <10.0.11
>=9.0.0, <9.0.19
>=8.0.0, <8.0.30
10.0.11
9.0.19
8.0.30
nuget Microsoft.WindowsDesktop.App.Runtime.win-x86
>=10.0.0, <10.0.11
>=9.0.0, <9.0.19
>=8.0.0, <8.0.30
10.0.11
9.0.19
8.0.30
bitnami dotnet
>=8.0.0, <8.0.30
>=9.0.0, <9.0.19
8.0.30
9.0.19
bitnami dotnet-sdk
>=8.0.0, <8.0.30
>=9.0.0, <9.0.19
8.0.30
9.0.19

Affected products

  • Microsoft .NET 8.0 runtime
  • Microsoft .NET 9.0 runtime
  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.8

Classification

Weakness
  • CWE-829 Inclusion of Functionality from Untrusted Control Sphere
  • CWE-693 Protection Mechanism Failure
  • CWE-918 Server-Side Request Forgery

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.