# matrix-sydent (PyPI) vulnerabilities Source: https://junglewise.ai/threats/technologies/matrix-sydent Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/matrix-sydent.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 7 vulnerabilities in matrix-sydent (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-2019-11842, was published on 9 July 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 7 (0 critical, 0 exploited in the wild) ## About matrix-sydent (PyPI) Matrix homeserver identity server component for managing user identities in Matrix networks. ## Latest matrix-sydent (PyPI) vulnerabilities - [CVE-2019-11842: PYSEC-2026-2620 - matrix-sydent and matrix-synapse Use Cryptographically Weak PRNG](https://junglewise.ai/threats/cve-2019-11842-matrix-sydent-and-matrix-synapse-use-cryptographically-weak-prng) (low, CVSS 3, published 9 Jul 2026) - [CVE-2019-11340: PYSEC-2026-843 - Matrix Sydent mishandles emails](https://junglewise.ai/threats/cve-2019-11340-matrix-sydent-mishandles-emails) (low, CVSS 3, published 6 Jul 2026) - [CVE-2023-38686: Sydent does not verify email server certificates](https://junglewise.ai/threats/cve-2023-38686-sydent-does-not-verify-email-server-certificates) (low, CVSS 3.1, published 4 Aug 2023) - [CVE-2021-29432: Malicious users could abuse Sydent to control the content of invitation emails](https://junglewise.ai/threats/cve-2021-29432-malicious-users-could-abuse-sydent-to-control-the-content-of) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2021-29431: SSRF in Sydent due to missing validation of hostnames](https://junglewise.ai/threats/cve-2021-29431-ssrf-in-sydent-due-to-missing-validation-of-hostnames) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2021-29430: Sydent vulnerable to denial of service attack via memory exhaustion](https://junglewise.ai/threats/cve-2021-29430-sydent-vulnerable-to-denial-of-service-attack-via-memory) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2021-29433: Sydent DoS (via resource exhaustion) due to improper input validation](https://junglewise.ai/threats/cve-2021-29433-sydent-dos-via-resource-exhaustion-due-to-improper-input) (low, CVSS 3.1, published 15 Apr 2021) ## Most severe matrix-sydent (PyPI) vulnerabilities - [CVE-2021-29430: Sydent vulnerable to denial of service attack via memory exhaustion](https://junglewise.ai/threats/cve-2021-29430-sydent-vulnerable-to-denial-of-service-attack-via-memory) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2021-29431: SSRF in Sydent due to missing validation of hostnames](https://junglewise.ai/threats/cve-2021-29431-ssrf-in-sydent-due-to-missing-validation-of-hostnames) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2021-29432: Malicious users could abuse Sydent to control the content of invitation emails](https://junglewise.ai/threats/cve-2021-29432-malicious-users-could-abuse-sydent-to-control-the-content-of) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2021-29433: Sydent DoS (via resource exhaustion) due to improper input validation](https://junglewise.ai/threats/cve-2021-29433-sydent-dos-via-resource-exhaustion-due-to-improper-input) (low, CVSS 3.1, published 15 Apr 2021) - [CVE-2023-38686: Sydent does not verify email server certificates](https://junglewise.ai/threats/cve-2023-38686-sydent-does-not-verify-email-server-certificates) (low, CVSS 3.1, published 4 Aug 2023) - [CVE-2019-11340: PYSEC-2026-843 - Matrix Sydent mishandles emails](https://junglewise.ai/threats/cve-2019-11340-matrix-sydent-mishandles-emails) (low, CVSS 3, published 6 Jul 2026) - [CVE-2019-11842: PYSEC-2026-2620 - matrix-sydent and matrix-synapse Use Cryptographically Weak PRNG](https://junglewise.ai/threats/cve-2019-11842-matrix-sydent-and-matrix-synapse-use-cryptographically-weak-prng) (low, CVSS 3, published 9 Jul 2026) ## 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, "matrix-sydent (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/matrix-sydent, 13 November 2026.