June 9, 2026—KB5095051 (OS Build 28000.2269)

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May 12, 2026—KB5089548 (OS Build 28000.2113)

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KB5094141: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: June 9, 2026

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CVE-2026-44881

Summary: Portainer Community Edition before fixes is vulnerable to arbitrary file read via Git-symlink injection when deploying stacks from Git repositories. During Git-backed stack creation/update, go-git v5 may create real OS symlinks for most files (except .gitmodules). The GET /api/stacks/{id...

Portainer Has an Arbitrary File Read via Git Symlink Injection in Stack Auto-Update

Summary Portainer supports deploying stacks from Git repositories. When a Git-backed stack is created or updated, Portainer clones the repository using go-git v5, which translates Git blob entries with mode 0o120000 symlink into real OS symlinks on the host filesystem via os.Symlink. The only ent...

KB5088064: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: May 12, 2026

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April 19, 2026—KB5091571 (OS Build 25398.2276) Out-of-band

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April 19, 2026—KB5091157 (OS Build 26100.32698) Out-of-band

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KB5082089: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: April 14, 2026

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KB5079233: Servicing stack update for Windows Server 2012 R2: March 10, 2026

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KB5079234: Servicing stack update for Windows Server 2012: March 10, 2026

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KB5075902: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: February 10, 2026

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January 24, 2026—KB5078136 (OS Build 20348.4651) Out-of-band

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January 24, 2026—KB5078135 (OS Build 26100.32236) Out-of-band

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January 17, 2026—KB5077800 (OS Build 20348.4650) Out-of-band

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January 17, 2026—KB5077792 (OS Build 25398.2096) Out-of-band

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January 17, 2026—KB5077793 (OS Build 26100.32234) Out-of-band

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KB5073447: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: January 13, 2026

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KB5068783: Servicing stack update for Windows Server 2012 R2: November 11, 2025

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KB5070247: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: November 11, 2025

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