Event Monitor Cyber
EM-20261110-W0F3 VulnerabilityHigh severity

ASP.NET Core Vulnerability (CVE-2026-109481)

CVE-2026-109481

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Status
Developing

Since : signals keep joining.

First Signal
Nov 10 17:00 UTCC41 Red Hat Security Data
Page Born
Nov 10 19:18 UTCsecond source joined
Last Signal
Nov 10 23:33 UTC3 hours before snapshot
Sources
31 official · 2 research, news or crowd
Open For
8 hoursso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 10 19:18 UTC
    C6 NVD published
  2. Scored: reached
    Nov 10 19:18 UTC
    CVSS 7.5
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: reached
    Nov 10 17:00 UTC
    C41 published
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

12:0014:0016:0018:0020:0022:00Nov 11BornC41 Red Hat Security DataC6 NVD CVE API 2.0C26 GitHub Advisory Database

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. GHSA-xw2x-23jm-j582 / CVE-2026-109481: Microsoft Security Advisory CVE-2026-109481 - ASP.NET Core Elevation of Privilege Vulnerability (opens source in a new tab) nuget:Microsoft.AspNetCore.App.Runtime.linux-arm, nuget:Microsoft.AspNetCore.App.Runtime.linux-arm64, nuget:Microsoft.AspNetCore.App.Runtime.linux-musl-arm, nuget:Microsoft.AspNetCore.App.Runtime.linux-musl-arm64… Med severityDatabaseC26 GitHub Advisory Database
  2. CVE-2026-109481 (CVSS 7.5) (opens source in a new tab) Cross-site request forgery (csrf) in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network. High severityDatabaseC6 NVD CVE API 2.0
  3. Red Hat: CVE-2026-109481 (important) (opens source in a new tab) dotnet11.0: ASP.NET Core Elevation of Privilege Vulnerability High severityVendorC41 Red Hat Security Data