Pysaml2 improperly initializes encryption vector
Python package pysaml2 version 4.5.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pysaml2 | < 4.6.0 | 4.6.0 |
References
- https://github.com/rohe/pysaml2/issues/417
- https://github.com/advisories/GHSA-cq94-qf6q-mf2h
- https://nvd.nist.gov/vuln/detail/CVE-2017-1000246
- https://github.com/IdentityPython/pysaml2/pull/519/commits/7323f5c20efb59424d853c822e7a26d1aa3e84aa
- https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2017-26.yaml
- https://github.com/rohe/pysaml2
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-330- Platform
- Python (PyPI)
- Package
pysaml2- Disclosed
- 17.11.2017
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2017-26 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-cq94-qf6q-mf2h - CC BY 4.0
Vulnerability history: pysaml2
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 03.2017 01.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 2
- Medium 3
Disclosures per year
- 2017: 3
- 2018: 1
- 2019: 0
- 2020: 1
- 2021: 2
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Pysaml2 improperly initializes encryption vector this entry
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