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security: fix CVE-2026-56857 [1.27 backport] #81898

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security: fix CVE-2026-56857 [1.27 backport]#81898
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CherryPickApprovedUsed during the release process for point releasesSecurity
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Go1.27.2

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@gopherbot
gopherbot
opened on Sep 30, 2026

@thatnealpatel requested issue #81739 to be considered for backport to the next 1.27 minor release.

@gopherbot Please open backports for this security issue.

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  1. gopherbot
    added
    Security
    CherryPickCandidateUsed during the release process for point releases
    on Sep 30, 2026
  2. gopherbot
    added this to the Go1.27.2 milestone on Sep 30, 2026
  3. thatnealpatel
    added
    CherryPickApprovedUsed during the release process for point releases
    and removed
    CherryPickCandidateUsed during the release process for point releases
    on Sep 30, 2026

  4. gopherbot commented on Oct 8, 2026

    @gopherbot
    gopherbot
    on Oct 8, 2026
    ContributorAuthor

    Change https://go.dev/cl/847029 mentions this issue: [release-branch.go1.27] os: correct Root junction handling on Windows (avoid mkdir escape)

  5. gopherbot
    added a commit that references this issue on Oct 8, 2026

    [release-branch.go1.27] os: correct Root junction handling on Windows…

    9636ab0

  6. gopherbot commented on Oct 8, 2026

    @gopherbot
    gopherbot
    on Oct 8, 2026
    ContributorAuthor

    Closed by merging CL 847029 (commit 9636ab0) to release-branch.go1.27.

  7. gopherbot
    closed this as completedon Oct 8, 2026
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