CVE-2026-69439 json
.NET and Visual Studio Elevation of Privilege Vulnerability
published 2026-09-08 2 mo ago modified 2026-10-31 8 d ago also BIT-dotnet-2026-69439 , BIT-dotnet-sdk-2026-69439 , EUVD-2026-73720 , GHSA-527h-q9f6-p7qx
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Patch / fix
- nuget Microsoft.DiaSymReader.Native 18.9.0-beta1.26405.2
- bitnami dotnet 8.0.31, 9.0.20, 10.0.12
- bitnami dotnet-sdk 8.0.31, 9.0.20, 10.0.12
- Microsoft .NET 10.0 runtime 10.0.12
- Microsoft .NET 11.0 runtime 11.0 RC1
- Microsoft .NET 8.0 runtime 8.0.31
- Microsoft .NET 9.0 runtime 9.0.20
- Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.40
- Microsoft Microsoft Visual Studio 2026 version 18.9 18.9.3
- 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-2026-69439
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Microsoft.DiaSymReader.Native | >=17.10.0-beta1.24272.1, <18.9.0-beta1.26405.2 |
18.9.0-beta1.26405.2 |
| bitnami | dotnet | >=8.0.0, <8.0.31 >=9.0.0, <9.0.20 >=10.0.0, <10.0.12 |
8.0.31 9.0.20 10.0.12 |
| bitnami | dotnet-sdk | >=8.0.0, <8.0.31 >=9.0.0, <9.0.20 >=10.0.0, <10.0.12 |
8.0.31 9.0.20 10.0.12 |
Affected products
- Microsoft .NET 10.0 runtime
- Microsoft .NET 11.0 runtime
- Microsoft .NET 8.0 runtime
- Microsoft .NET 9.0 runtime
- Microsoft Microsoft Visual Studio 2022 version 17.14
- Microsoft Microsoft Visual Studio 2026 version 18.9
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-69439
vendor-advisory, patch, web, advisory
-
github.com
/dotnet/runtime/security/advisories/GHSA-527h-q9f6-p7qx
web
-
github.com
/dotnet/runtime
package
-
nvd.nist.gov
/vuln/detail/cve-2026-69439
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-69439
web
Sources
- CVE List CVE-2026-69439
- GitHub Advisory GHSA-527h-q9f6-p7qx
- NVD CVE-2026-69439
- OSV BIT-dotnet-2026-69439
- OSV BIT-dotnet-sdk-2026-69439
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.