No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
leb128 has 3.5M monthly downloads and 31 GitHub stars. Version 1.0.9, first published in 2020.
It is stably maintained under a permissive license, last released in Jan 2026.
It is used by 25 tracked packages, including asynch, auditwheel-emscripten and numcodecs-combinators.
Package Insights
Package Risks
- Moderate bus factor: only 3 contributor(s) for this download volume
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
55
Popularity
28
Adoption
60
Community
10
Provenance
0
How the maintenance status was determined
Last commit
101 days ago
Monthly downloads
3,543,134
Active
Activity within 30 days
•
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
3,543,134
Stars
31
Stars per 1k downloads
0.01
Industry Standard
> 10,000,000 monthly downloads
•
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
102,138
Month daily avg
118,104
Momentum
-13.5%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
Not specified
Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
•
Unknown
No requires_python specified or unparseable
Package does not declare a minimum Python version.
License categories
License
MIT License
•
Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
178 days ago
Total releases
10
Releases/year
1.6
Rapid
Last release within 365 days and > 12 releases/year
•
Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
3
Monthly downloads
3,543,134
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
•
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
23
Issue Burden
-
per 1k stars
Discussions
-
per 1k stars
Fork Ratio
75.0%
contrib / forks
Stale Release
76d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
52.4K
macOS
360
Windows
158
Python Versions
3.8
30.6%
15.5K
3.10
26.2%
13.2K
3.11
23.9%
12.1K
3.12
14.5%
7.4K
3.13
4.8%
2.4K
Top Countries
1.
US
40.0K
US
2.
DE
4.3K
DE
3.
IE
1.5K
IE
4.
RU
1.3K
RU
5.
NL
978
NL
6.
FI
867
FI
7.
IN
786
IN
8.
FR
757
FR
9.
ES
667
ES
10.
HR
466
HR
Dependencies
0
No dependencies
Used By
25
- asynch
- auditwheel-emscripten
- numcodecs-combinators
- numcodecs-tokenize
- numcodecs-bitmap-index
- numcodecs-zero
- ccdexplorer-fundamentals
- numcodecs-pw-ratio
- numcodecs-safeguards
- numcodecs-mask
- gtirb-rewriting
- pca-b-stream
- pybyntic
- wasm-action
- ccdefundamentals
- rlmate
- numcodecs-random-projection
- numcodecs-huffman
- asynch-lxneng
- isaac-toolkit
- filecoin-address
- unit-db-test
- proofcodec-verify
- asynch-tikon93
- tit-cli
Package Information
License
MIT License
First Release
April 18, 2020
Last Release
5 months ago
Last Commit
3 months ago
Latest Version
1.0.9
Total Releases
10
Contributors
3
Open PRs
0
Archived
No
Wheels
py2
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh