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curl upload bug prior to 8.7.0

From: Ray Satiro via curl-distros <curl-distros_at_lists.haxx.se>
Date: Thu, 27 Aug 2026 18:37:27 -0400

Two weeks ago someone reported data corruption in HTTP/2 uploads in
libcurl versions prior to 8.7.0 [1]. Though the report is for libcurl,
the curl tool may be affected as well since it uses libcurl. Unlike
issues that we patch for this one was apparently fixed incidentally in
curl 8.7.0 (ie due to some other change) and we do not have a patch for it.

We take data corruption seriously. However this issue is outside the
scope of our support because it is not present in current curl. I assume
some of you on this list are maintainers supporting older versions of
curl so this issue may be of interest to you.


[1]: https://github.com/curl/curl/issues/22563

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Received on 2026-08-28