Vulnerability in Microsoft.Build.Tasks.Git (CVE-2026-62900)
Summary
Vulnerability in Microsoft.Build.Tasks.Git (CVE-2026-62900). Confidential information can be exposed externally. Mitigation: upgrade to 10.0.303 or later.
Original description
The description as published by the source.
Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.Build.Tasks.Git and Microsoft.SourceLink.AzureRepos.Git. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
Improper removal of sensitive information before storage or transfer in .NET allows an unauthorized attacker to disclose information over a network.
Announcement
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/**TBD**
CVSS Details
- Version: 3.1
- Severity: Medium
- Score: 5.9
- Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness: CWE-212: Improper Removal of Sensitive Information Before Storage or Transfer
Affected Platforms
- Platforms: Windows, Linux, macOS
- Architectures: All
Affected Packages
The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below
Published NuGet packages
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.Build.Tasks.Git | = 8.0.0 | No patched NuGet version; update to a fixed .NET 8 SDK |
| Microsoft.Build.Tasks.Git | >= 10.0.102, <= 10.0.110 | 10.0.111 |
| [Microsoft.Build.Tasks.Git](https://www.nuget… |
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-62900 has been found in Microsoft.Build.Tasks.Git.
Confidential information can be exposed externally. CVSS score: 5.9/10.
What to do: upgrade Microsoft.Build.Tasks.Git to 10.0.303 or later.
If unsure, ask your IT team or search "Microsoft.Build.Tasks.Git CVE-2026-62900" on the vendor's site.
CVE-2026-62900 (Microsoft.Build.Tasks.Git) — CWE-212 / CVSS v3 5.9
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 10.0.303 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-212) exists in Microsoft.Build.Tasks.Git.
Check the vendor advisory for the affected versions of Microsoft.Build.Tasks.Git.
Severity: Medium (CVSS 5.9/10). Confidential information can be exposed externally.
Update to 10.0.303.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Microsoft.Build.Tasks.Git' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Microsoft.Build.Tasks.Git' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Microsoft.Build.Tasks.Gitを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade Microsoft.Build.Tasks.Git to 10.0.303ステージング環境で 10.0.303 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- web msrc.microsoft.com
- web github.com
- web nvd.nist.gov
- web github.com