CVE-2026-62909 — dotnet
CVE-2026-62909 is a CWE-252 vulnerability in dotnet. A fix is available for dotnet — see the affected versions and patch details below.
.NET Elevation of Privilege Vulnerability
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-62909.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
Real-World Exposure
dotnetReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Bitnami packages — download data is not available via public APIs for these ecosystems.
Description
Uncaught exception in .NET allows an authorized attacker to elevate privileges locally.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦Bitnami | dotnet | ≥ 8.0.0&&< 8.0.30 | 8.0.30 |
Affected Products
.netmicrosoftvisual studio 2022microsoftvisual studio 2026microsoftDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dotnet, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update dotnet to 8.0.30 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-62909 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This vulnerability is rated as Important. A truncation error in the .NET diagnostics IPC, specifically within ipc_transport_get_default_name when processing excessively long TMPDIR paths, could lead to a local elevation of privilege. This allows an attacker with local access to potentially gain higher privileges on…
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.Source: Red Hat security advisory for CVE-2026-62909 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 10 | dotnet8.0-0:8.0.130-1.el10_2 | RHSA-2026:54541 |
| Red Hat Enterprise Linux 10 | dotnet9.0-0:9.0.120-1.el10_2 | RHSA-2026:54590 |
| Red Hat Enterprise Linux 10 | dotnet10.0-0:10.0.111-1.el10_2 | RHSA-2026:55858 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | dotnet8.0-0:8.0.130-1.el10_0 | RHSA-2026:58566 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | dotnet9.0-0:9.0.120-1.el10_0 | RHSA-2026:58567 |
| Red Hat Enterprise Linux 8 | dotnet8.0-0:8.0.130-1.el8_10 | RHSA-2026:54538 |
| Red Hat Enterprise Linux 8 | dotnet10.0-0:10.0.111-1.el8_10 | RHSA-2026:54542 |
| Red Hat Enterprise Linux 8 | dotnet9.0-0:9.0.120-1.el8_10 | RHSA-2026:54550 |
Frequently Asked Questions
Is CVE-2026-62909 in your dependencies?
Find it across Bitnami, including transitive dependencies.