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Medium, CVSS 5.9amended

Microsoft Security Advisory CVE-2026-62900 – .NET Information Disclosure Vulnerability

CVE-2026-62900GHSA-23fw-v26w-5fgq

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • NuGet microsoft.sourcelink.azurerepos.git

    Affected
    >= 8.0.0, <= 8.0.0>= 10.0.102, <= 10.0.110>= 10.0.200, <= 10.0.204>= 10.0.300, <= 10.0.301
    Fixed in
    10.0.111, 10.0.303

  • NuGet microsoft.build.tasks.git

    Affected
    >= 8.0.0, <= 8.0.0>= 10.0.102, <= 10.0.110>= 10.0.200, <= 10.0.204>= 10.0.300, <= 10.0.301
    Fixed in
    10.0.111, 10.0.303

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2026-62900: 0.75% estimated exploitation activity in the next 30 days; percentile 54.98 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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 <a name="affected-packages"</aAffected Packages The vulnerability affects any Microsoft .NET project if it uses any of affected package versions…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-23fw-v26w-5fgq

  2. Revision 1 · created ·

    Published from osv record GHSA-23fw-v26w-5fgq

Agent brief

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# Patch Next advisory brief: CVE-2026-62900

Advisory: Microsoft Security Advisory CVE-2026-62900 – .NET Information Disclosure Vulnerability
IDs: CVE-2026-62900, GHSA-23fw-v26w-5fgq
Record: https://patchnext.com/advisories/cve-2026-62900 (revision 2, source checked 26 Oct 2026, 17:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: microsoft.sourcelink.azurerepos.git 10.0.303, 10.0.111; microsoft.build.tasks.git 10.0.303, 10.0.111. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet microsoft.sourcelink.azurerepos.git: affected >= 8.0.0, <= 8.0.0; >= 10.0.102, <= 10.0.110; >= 10.0.200, <= 10.0.204; >= 10.0.300, <= 10.0.301; fixed in 10.0.111, 10.0.303
- NuGet microsoft.build.tasks.git: affected >= 8.0.0, <= 8.0.0; >= 10.0.102, <= 10.0.110; >= 10.0.200, <= 10.0.204; >= 10.0.300, <= 10.0.301; fixed in 10.0.111, 10.0.303

## Suggested inspection (read-only)
- NuGet microsoft.sourcelink.azurerepos.git: check the installed version with your package manager.
- NuGet microsoft.build.tasks.git: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on microsoft.sourcelink.azurerepos.git, microsoft.build.tasks.git.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-23fw-v26w-5fgq (OSV record GHSA-23fw-v26w-5fgq lists affected ranges: NuGet microsoft.build.tasks.git >=8.0.0 =10.0.102 =10.0.200 =10.0.300 =8.0.0 =10.0.102 =10.0.200 =10.0.300 <10.0.303 (fixed))
- Verified: https://github.com/advisories/GHSA-23fw-v26w-5fgq (GitHub-reviewed advisory GHSA-23fw-v26w-5fgq lists affected ranges: NuGet microsoft.build.tasks.git >=8.0.0 =10.0.102 =10.0.200 =10.0.300 =8.0.0 =10.0.102 =10.0.200 =10.0.300 <=10.0.301)

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