[3.14] gh-145264: Do not ignore excess Base64 data after the first padded quad (GH-145267)#146326
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serhiy-storchaka wants to merge 1 commit intopython:3.14from
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[3.14] gh-145264: Do not ignore excess Base64 data after the first padded quad (GH-145267)#146326serhiy-storchaka wants to merge 1 commit intopython:3.14from
serhiy-storchaka wants to merge 1 commit intopython:3.14from
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…rst padded quad (pythonGH-145267) Base64 decoder (see binascii.a2b_base64(), base64.b64decode(), etc) no longer ignores excess data after the first padded quad in non-strict (default) mode. Instead, in conformance with RFC 4648, it ignores the pad character, "=", if it is present before the end of the encoded data. (cherry picked from commit 4561f64) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This was referenced Mar 23, 2026
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Base64 decoder (see binascii.a2b_base64(), base64.b64decode(), etc) no longer ignores excess data after the first padded quad in non-strict (default) mode. Instead, in conformance with RFC 4648, it ignores the pad character, "=", if it is present before the end of the encoded data.
(cherry picked from commit 4561f64)