ASN1C 8.0.0 was released on January 29, 2026. New features in this release include the following:

• Support has been added for CER encoding and decoding in Python.

• Support for generating compacted Python run-time code has been added through the use of the "-genruntime" option.

• ISO 8601 DATE and TIME support has been added for Python BER, CER, and PER encoding rules.

• Support has been added to Windows distributions for .NET v10.

• Support has been added to Windows distributions for Visual Studio 2026.

• An optimized C# run-time assembly has been added to Windows distributions.

The following defects were fixed in this release:

• Fixed a bug in C OER decoding for OCTET STRING (CONTAINING T). The decoder would typically fail at some point, due to attempting to read a byte it shouldn't have been reading (A1C-1831).