PyPI · pypi:pyasn1

pyasn1 active

Pure-Python implementation of ASN.1 types and DER/BER/CER codecs (X.208)

The latest stable version of pyasn1 is 0.6.5, published on 2026-10-27. Verified by Vigia on 2026-11-13.

Latest stable version	0.6.5
Published	2026-10-27 06:32:48 UTC
Install	`pip install --upgrade pyasn1`
Requires	`python >=3.8`
License	BSD-2-Clause
Advisories on latest version	none known
Last verified	2026-11-13 07:50:31 UTC
Sources	pypi.org

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Maintenance

Activity	active
Last stable release	2026-10-27 06:32:48 UTC · 17 days ago
Stable releases in the last 12 months	4
Published versions	43

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

Version	Published
`0.6.5`	2026-10-27 06:32:48 UTC
`0.6.4`	2026-07-09 01:12:32 UTC
`0.6.3`	2026-03-17 01:06:52 UTC
`0.6.2`	2026-01-16 18:04:17 UTC
`0.6.1`	2024-09-10 22:41:42 UTC
`0.6.0`	2024-03-26 20:07:32 UTC
`0.5.1`	2023-11-20 20:52:56 UTC
`0.5.0`	2023-04-20 00:54:28 UTC
`0.4.8`	2019-11-16 17:27:11 UTC
`0.4.7`	2019-09-01 16:11:42 UTC
`0.4.6`	2019-07-31 19:57:17 UTC
`0.4.5`	2018-12-29 21:05:04 UTC
`0.4.4`	2018-07-26 07:43:53 UTC
`0.4.3`	2018-05-23 20:39:07 UTC
`0.4.2`	2017-11-23 18:56:03 UTC
`0.4.1`	2017-11-23 10:54:10 UTC
`0.3.7`	2017-10-04 20:12:35 UTC
`0.3.6`	2017-09-20 20:37:18 UTC
`0.3.5`	2017-09-16 22:22:36 UTC
`0.3.4`	2017-09-07 07:30:29 UTC

Showing the 20 most recent of 36 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

Runtime	Newest compatible version
`python 3.8`	`0.6.5`
`python 3.9`	`0.6.5`
`python 3.10`	`0.6.5`
`python 3.11`	`0.6.5`
`python 3.12`	`0.6.5`
`python 3.13`	`0.6.5`

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Frequently asked questions

What is the latest version of pyasn1?

The latest stable version of pyasn1 is 0.6.5, published on 2026-10-27. Verified by Vigia on 2026-11-13.

How do I install the latest version of pyasn1?

Run pip install --upgrade pyasn1. The latest stable version is 0.6.5 (verified 2026-11-13).

Is pyasn1 deprecated?

No. pyasn1 is not marked as deprecated in the registry.

Which Python version does pyasn1 require?

pyasn1 0.6.5 declares this requirement: python >=3.8.

Does pyasn1 0.6.5 have known vulnerabilities?

No known advisories affect pyasn1 0.6.5 according to the data Vigia checks.

Is pyasn1 still maintained?

pyasn1 published 4 stable releases in the last 12 months; the most recent was 17 days ago. Activity: active.

Observed changes

ue Oct 27 2026 06:34:18 GMT+0000 (Coordinated Universal Time) — released 0.6.4 → 0.6.5

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