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CVE-2026-62899

.NET Security Feature Bypass Vulnerability

CVSS score

5.9

EPSS probability

%0.7

Risk score

0.0

Published

2 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-62899 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-62899 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1microsoft.NET 10.0 View
2microsoft.NET 8.0 View
3microsoft.NET 9.0 View
4microsoftMicrosoft Visual Studio 2022 version 17.14 View
5microsoftMicrosoft Visual Studio 2026 version 18.8 View
6microsoftvisual studio 2022 View
7microsoftvisual studio 2026 View
8microsoft.net View
9microsoft.net View
10applemacos View
11linuxlinux kernel View
12microsoftwindows View
13microsoft.net View
14nugetMicrosoft.NETCore.App.Runtime.linux-arm View
15nugetMicrosoft.NETCore.App.Runtime.linux-arm64 View
16nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm View
17nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm64 View
18nugetMicrosoft.NETCore.App.Runtime.linux-musl-x64 View
19nugetMicrosoft.NETCore.App.Runtime.linux-x64 View
20nugetMicrosoft.NETCore.App.Runtime.osx-arm64 View
21nugetMicrosoft.NETCore.App.Runtime.osx-x64 View
22nugetMicrosoft.NETCore.App.Runtime.linux-arm View
23nugetMicrosoft.NETCore.App.Runtime.linux-arm64 View
24nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm View
25nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm64 View
26nugetMicrosoft.NETCore.App.Runtime.linux-musl-x64 View
27nugetMicrosoft.NETCore.App.Runtime.linux-x64 View
28nugetMicrosoft.NETCore.App.Runtime.osx-arm64 View
29nugetMicrosoft.NETCore.App.Runtime.osx-x64 View
30nugetMicrosoft.NETCore.App.Runtime.linux-arm View
31nugetMicrosoft.NETCore.App.Runtime.linux-arm64 View
32nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm View
33nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm64 View
34nugetMicrosoft.NETCore.App.Runtime.linux-musl-x64 View
35nugetMicrosoft.NETCore.App.Runtime.linux-x64 View
36nugetMicrosoft.NETCore.App.Runtime.osx-arm64 View
37nugetMicrosoft.NETCore.App.Runtime.osx-x64 View
38nugetMicrosoft.NETCore.App.Runtime.linux-arm View
39nugetMicrosoft.NETCore.App.Runtime.linux-arm64 View
40nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm View
41nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm64 View
42nugetMicrosoft.NETCore.App.Runtime.linux-musl-x64 View
43nugetMicrosoft.NETCore.App.Runtime.linux-x64 View
44nugetMicrosoft.NETCore.App.Runtime.osx-arm64 View
45nugetMicrosoft.NETCore.App.Runtime.osx-x64 View
46nugetMicrosoft.NETCore.App.Runtime.linux-arm View
47nugetMicrosoft.NETCore.App.Runtime.linux-arm64 View
48nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm View
49nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm64 View
50nugetMicrosoft.NETCore.App.Runtime.linux-musl-x64 View
51nugetMicrosoft.NETCore.App.Runtime.linux-x64 View
52nugetMicrosoft.NETCore.App.Runtime.osx-arm64 View
53nugetMicrosoft.NETCore.App.Runtime.osx-x64 View
54nugetMicrosoft.NETCore.App.Runtime.linux-arm View
55nugetMicrosoft.NETCore.App.Runtime.linux-arm64 View
56nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm View
57nugetMicrosoft.NETCore.App.Runtime.linux-musl-arm64 View
58nugetMicrosoft.NETCore.App.Runtime.linux-musl-x64 View
59nugetMicrosoft.NETCore.App.Runtime.linux-x64 View
60nugetMicrosoft.NETCore.App.Runtime.osx-arm64 View
61nugetMicrosoft.NETCore.App.Runtime.osx-x64 View
Total affected vendors: 4|Products: 61

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.9CVSS V31MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NNVD
5.9CVSS 3.x—Vector not publishedGitHub Advisory
5.9CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:CCVE CNA
0.0CVSS 4.0—Vector not publishedGitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

27 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
osvMicrosoft.NETCore.App.Runtime.linux-arm10.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.linux-arm6410.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.linux-musl-arm10.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.linux-musl-arm6410.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.linux-musl-x6410.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.linux-x6410.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.osx-arm6410.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.osx-x6410.0.11

OSV düzeltilmiş sürüm: 10.0.11

osvMicrosoft.NETCore.App.Runtime.linux-arm9.0.19

OSV düzeltilmiş sürüm: 9.0.19

osvMicrosoft.NETCore.App.Runtime.linux-arm649.0.19

OSV düzeltilmiş sürüm: 9.0.19

osvMicrosoft.NETCore.App.Runtime.linux-musl-arm9.0.19

OSV düzeltilmiş sürüm: 9.0.19

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-62899 is associated with the following CWEs:

CWE-444: Common Weakness Enumeration Entry CWE-444

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-62899 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

.NET Security Feature Bypass Vulnerabilitypatchhttps://github.com/dotnet/runtime/security/advisories/GHSA-r6mh-95jw-g7qgvendor-advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-62899vendor-advisoryhttps://github.com/dotnet/announcements/issues/427vendor-advisoryhttps://github.com/advisories/GHSA-r6mh-95jw-g7qgvendor-advisoryhttps://github.com/dotnet/runtimevendor-advisory

CVSS Vector Radar Chart

5.9 / 10
Attack VectorNetworkComplexityHighPrivilegesNoneUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama doğrulandı

27 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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A
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apple
L
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linux
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Weakness Type (CWE & CAPEC)

CWE-444

Similar Vulnerabilities

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