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author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:44:09 +0200
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1 # Items to be removed from future curl releases
2
3 If any of these deprecated features is a cause for concern for you, please
4 email the curl-library mailing list as soon as possible and explain to us why
5 this is a problem for you and how your use case can't be satisfied properly
6 using a work around.
7
8 ## PolarSSL
9
10 The polarssl TLS library has not had an update in over three years. The last
11 release was done on [January 7
12 2016](https://tls.mbed.org/tech-updates/releases). This library has been
13 superseded by the mbedTLS library, which is the current incarnation of
14 PolarSSL. curl has supported mbedTLS since 2015.
15
16 It seems unlikely that this library is a good choice for users to get proper
17 TLS security and support today and at the same time there are plenty of good
18 and updated alternatives.
19
20 I consider it likely that the existing users of curl + polarssl out there are
21 stuck on old curl versions and when they eventually manage to update curl they
22 should also be able to update their TLS library.
23
24 ### State
25
26 In the curl 7.65.2 release (July 17, 2019) the ability to build with this TLS
27 backend is removed from the configure script. The code remains and can be
28 built and used going forward, but it has to be manually enabled in a build (or
29 the configure removal reverted).
30
31 ### Removal
32
33 The support for PolarSSL and all code for it will be completely removed from
34 the curl code base six months after it ships disabled in configure in a
35 release. In the release on or near February 27, 2020. (possibly called curl
36 7.70.0).