module: std
package: archive/zip
versions:
  - introduced: go1.16
    fixed: go1.16.1
description: |
    Using Reader.Open on an archive containing a file with a path
    prefixed by "../" will cause a panic due to a stack overflow.
    If parsing user supplied archives, this may be used as a
    denial of service vector.
published: 2021-04-14T20:04:52Z
cves:
  - CVE-2021-27919
symbols:
  - toValidName
links:
    pr: https://go-review.googlesource.com/c/go/+/300489
    commit: https://go.googlesource.com/go/+/cd3b4ca9f20fd14187ed4cdfdee1a02ea87e5cd8
    context:
      - https://go.dev/issue/44916