# pysaml2 (PyPI) vulnerabilities Source: https://junglewise.ai/threats/technologies/pypi-pysaml2 Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/pypi-pysaml2.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 7 vulnerabilities in pysaml2 (PyPI): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2021-21238, was published on 21 January 2021. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 7 (0 critical, 0 exploited in the wild) ## About pysaml2 (PyPI) pysaml2 is a Python implementation of the SAML 2.0 standard for authentication and authorization. ## Latest pysaml2 (PyPI) vulnerabilities - [CVE-2021-21238: SAML XML Signature wrapping in PySAML2](https://junglewise.ai/threats/cve-2021-21238-saml-xml-signature-wrapping-in-pysaml2) (low, CVSS 3.1, published 21 Jan 2021) - [CVE-2021-21239: Improper Verification of Cryptographic Signature in PySAML2](https://junglewise.ai/threats/cve-2021-21239-improper-verification-of-cryptographic-signature-in-pysaml2) (low, CVSS 3.1, published 21 Jan 2021) - [CVE-2020-5390: Improper Verification of Cryptographic Signature in PySAML2](https://junglewise.ai/threats/cve-2020-5390-improper-verification-of-cryptographic-signature-in-pysaml2) (low, CVSS 3.1, published 13 Jan 2020) - [CVE-2017-1000433: pysaml2 Improper Authentication vulnerability](https://junglewise.ai/threats/cve-2017-1000433-pysaml2-improper-authentication-vulnerability) (low, CVSS 3.1, published 2 Jan 2018) - [CVE-2017-1000246: Pysaml2 improperly initializes encryption vector](https://junglewise.ai/threats/cve-2017-1000246-pysaml2-improperly-initializes-encryption-vector) (low, CVSS 3, published 17 Nov 2017) - [CVE-2016-10149: Pysaml2 does not sanitize XML responses](https://junglewise.ai/threats/cve-2016-10149-pysaml2-does-not-sanitize-xml-responses) (low, CVSS 3, published 24 Mar 2017) - [CVE-2016-10127: PYSEC-2017-67 - PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML…](https://junglewise.ai/threats/cve-2016-10127-pysaml2-xml-external-entity-attack) (low, CVSS 3, published 3 Mar 2017) ## Most severe pysaml2 (PyPI) vulnerabilities - [CVE-2017-1000433: pysaml2 Improper Authentication vulnerability](https://junglewise.ai/threats/cve-2017-1000433-pysaml2-improper-authentication-vulnerability) (low, CVSS 3.1, published 2 Jan 2018) - [CVE-2021-21239: Improper Verification of Cryptographic Signature in PySAML2](https://junglewise.ai/threats/cve-2021-21239-improper-verification-of-cryptographic-signature-in-pysaml2) (low, CVSS 3.1, published 21 Jan 2021) - [CVE-2020-5390: Improper Verification of Cryptographic Signature in PySAML2](https://junglewise.ai/threats/cve-2020-5390-improper-verification-of-cryptographic-signature-in-pysaml2) (low, CVSS 3.1, published 13 Jan 2020) - [CVE-2021-21238: SAML XML Signature wrapping in PySAML2](https://junglewise.ai/threats/cve-2021-21238-saml-xml-signature-wrapping-in-pysaml2) (low, CVSS 3.1, published 21 Jan 2021) - [CVE-2016-10149: Pysaml2 does not sanitize XML responses](https://junglewise.ai/threats/cve-2016-10149-pysaml2-does-not-sanitize-xml-responses) (low, CVSS 3, published 24 Mar 2017) - [CVE-2016-10127: PYSEC-2017-67 - PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML…](https://junglewise.ai/threats/cve-2016-10127-pysaml2-xml-external-entity-attack) (low, CVSS 3, published 3 Mar 2017) - [CVE-2017-1000246: Pysaml2 improperly initializes encryption vector](https://junglewise.ai/threats/cve-2017-1000246-pysaml2-improperly-initializes-encryption-vector) (low, CVSS 3, published 17 Nov 2017) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other PyPI technologies - [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities - [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities - [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities - [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities - [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities - [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities - [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities - [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities - [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities - [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities - [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities - [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "pysaml2 (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-pysaml2, 13 November 2026.