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gh-160097: Reject links replacing the destination in tarfile.tar_filter - #160098
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StanFromIreland wants to merge 3 commits into
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StanFromIreland
commented
Oct 21, 2026
| # would replace it with a (sym)link, redirecting the destination | ||
| # for all subsequent members. | ||
| if ((member.islnk() or member.issym()) | ||
| and os.path.normpath(name) == os.curdir): |
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The old check compared the member's real path against the real path of the destination directory, this was incorrect. For example, a link named x was rejected whenever an earlier x -> . symlink existed, even though extracting it only replaces that symlink (and never touches the destination directory).
CC @gps-head
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tarfile.tar_filterdoesn't handle symlinks with empty names #160097