CVE-2026-102870: dotnet8, dotnet10, dotnet11 vulnerabilities
Affects dotnet8Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 8.8 High · fixed in 8.0.133-8.0.33-0ubuntu1~22.04.1 : patch dotnet8 soon.
Data as of 31 Oct 2026, 04:23 UTC
Thin evidence
One scorer or none| CNA (microsoft) | CVSS 3.1 | 8.8 |
|---|
- Patch
- Available – fixed in 8.0.133-8.0.33-0ubuntu1~22.04.1, 10.0.114-10.0.14-0ubuntu1~24.04.1, 8.0.133-8.0.33-0ubuntu1~24.04.1 +3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 13 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10dotnet10pkg:deb/ubuntu/dotnet10?arch=source&distro=stonkingOther threats | Affected
| Fixed in
|
Ubuntu 26.10dotnet11pkg:deb/ubuntu/dotnet11?arch=source&distro=stonkingOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSdotnet10pkg:deb/ubuntu/dotnet10?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSdotnet10pkg:deb/ubuntu/dotnet10?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSdotnet8pkg:deb/ubuntu/dotnet8?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 22.04 LTSdotnet8pkg:deb/ubuntu/dotnet8?arch=source&distro=jammyOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied promptly. The vendor advisory (Ubuntu Security Notice USN-8958-1) provides updated package versions that fix these vulnerabilities. Users should update their systems using standard system update procedures to the fixed versions listed in the advisory. No additional mitigation actions are required beyond applying these updates.
Description
Multiple vulnerabilities were identified in the .NET platform affecting versions dotnet8, dotnet10, and dotnet11. These include a code execution flaw in the Blazor WebAssembly debug proxy due to improper escaping, a denial of service or code execution issue in the Brotli decompression library, and a local privilege escalation vulnerability related to improper file ownership handling. Fixes have been released for these issues across various Ubuntu releases.