This release fixes the following security related issues:
* gh-144125: BytesGenerator will now refuse to serialize (write) headers that
are unsafely folded or delimited; see verify_generated_headers.
* gh-143935: Fixed a bug in the folding of comments when flattening an
email message using a modern email policy. Comments consisting of a
very long sequence of non-foldable characters could trigger a forced
line wrap that omitted the required leading space on the continuation
line, causing the remainder of the comment to be interpreted as a new
header field. This enabled header injection with carefully crafted
inputs.
* gh-143925: Reject control characters in data: URL media types.
* gh-143919: Reject control characters in http.cookies.Morsel fields and values.
* gh-143916: Reject C0 control characters within wsgiref.headers.Headers
fields, values, and parameters.
Full release notes:
https://docs.python.org/release/3.13.12/whatsnew/changelog.html
Signed-off-by: Marcus Hoffmann <buildroot@bubu1.eu>
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Marcus Hoffmann
b12c1e0abf