CVE-2026-47303 | ASP.NET Core Elevation of Privilege Vulnerability

Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

Published: 2026-07-14 Last update: 2026-07-15 Assigner: [email protected] Source: [email protected]
NVD Status：Awaiting Analysis，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-47303 is rated Moderate Risk (50.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.58%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-47303

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-07-15 — 0.58% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-47303

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2026-47303

OS Trackers for CVE-2026-47303

vendor priority summary link
ubuntu medium CVE-2026-47303 medium priority: Ubuntu including 5 source packages (dotnet10, dotnet6, dotnet7, dotnet8, dotnet9), 40 status rows across 8 suites (bionic, focal, jammy, noble, resolute, trusty, upstream, xenial): DNE 29, needs-triage 5, needed 4, deferred 1, ignored 1. https://ubuntu.com/security/CVE-2026-47303

Affected software / configurations for CVE-2026-47303

Vendor Product Version Raw CPE
microsoft .net >= 10.0.0, < 10.0.6 cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
microsoft .net >= 8.0.0, < 8.0.29 cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
microsoft .net >= 9.0.0, < 9.0.18 cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
microsoft visual_studio_2022 >= 17.12.0, < 17.12.22 cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
microsoft visual_studio_2022 >= 17.14.0, < 17.14.36 cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
microsoft visual_studio_2026 >= 18.0, < 18.7.4 cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*

References for CVE-2026-47303

cvelogic Threat Intelligence