# Zulip vulnerabilities Source: https://junglewise.ai/threats/vendors/zulip Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/zulip.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 8 vulnerabilities in Zulip: 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-115574, was published on 4 November 2026. 5 vulnerabilities in the last four weeks, up from none in the four before. 2 technologies have a page of their own. ## Counts - Last 7 days: 0 - Last 30 days: 5 - Last 90 days: 5 - All time: 8 (0 critical, 0 exploited in the wild) ## About Zulip Open source team chat and collaboration platform with threaded messaging and topic organization. ## Latest Zulip vulnerabilities - [CVE-2026-115574: Zulip custom profile fields information disclosure](https://junglewise.ai/threats/cve-2026-115574-zulip-is-an-open-source-team-collaboration-tool-from-11-0-until) (medium, CVSS 5.3, published 4 Nov 2026) - [CVE-2026-115474: Zulip authorization bypass in draft message handling](https://junglewise.ai/threats/cve-2026-115474-zulip-is-an-open-source-team-collaboration-tool-from-8-0-until) (medium, CVSS 6.5, published 4 Nov 2026) - [CVE-2026-97701: Zulip Server missing content length limit in render endpoint](https://junglewise.ai/threats/cve-2026-97701-zulip-is-an-open-source-team-collaboration-tool-in-zulip-server) (medium, CVSS 6.5, published 4 Nov 2026) - [CVE-2026-102893: Zulip Server OpenID Connect email verification bypass](https://junglewise.ai/threats/cve-2026-102893-zulip-is-an-open-source-team-collaboration-tool-in-zulip-server) (info, published 14 Oct 2026) - [CVE-2026-100404: Zulip Server information disclosure in event queue](https://junglewise.ai/threats/cve-2026-100404-zulip-is-an-open-source-team-collaboration-tool-in-zulip-server) (medium, CVSS 6.5, published 14 Oct 2026) - [CVE-2026-40300: Zulip Server improper access control in message history API](https://junglewise.ai/threats/cve-2026-40300-zulip-server-improper-access-control-in-message-history-api) (medium, CVSS 6.5, published 12 May 2026) - [CVE-2026-26058: Zulip Server path traversal in data import utility](https://junglewise.ai/threats/cve-2026-26058-zulip-server-path-traversal-in-data-import-utility) (medium, CVSS 6.1, published 3 Apr 2026) - [CVE-2026-25742: Zulip missing authorization for anonymous access to attachments and topics](https://junglewise.ai/threats/cve-2026-25742-zulip-missing-authorization-for-anonymous-access-to-attachments) (medium, CVSS 5.3, published 3 Apr 2026) ## Most severe Zulip vulnerabilities - [CVE-2026-100404: Zulip Server information disclosure in event queue](https://junglewise.ai/threats/cve-2026-100404-zulip-is-an-open-source-team-collaboration-tool-in-zulip-server) (medium, CVSS 6.5, published 14 Oct 2026) - [CVE-2026-115474: Zulip authorization bypass in draft message handling](https://junglewise.ai/threats/cve-2026-115474-zulip-is-an-open-source-team-collaboration-tool-from-8-0-until) (medium, CVSS 6.5, published 4 Nov 2026) - [CVE-2026-97701: Zulip Server missing content length limit in render endpoint](https://junglewise.ai/threats/cve-2026-97701-zulip-is-an-open-source-team-collaboration-tool-in-zulip-server) (medium, CVSS 6.5, published 4 Nov 2026) - [CVE-2026-40300: Zulip Server improper access control in message history API](https://junglewise.ai/threats/cve-2026-40300-zulip-server-improper-access-control-in-message-history-api) (medium, CVSS 6.5, published 12 May 2026) - [CVE-2026-26058: Zulip Server path traversal in data import utility](https://junglewise.ai/threats/cve-2026-26058-zulip-server-path-traversal-in-data-import-utility) (medium, CVSS 6.1, published 3 Apr 2026) - [CVE-2026-25742: Zulip missing authorization for anonymous access to attachments and topics](https://junglewise.ai/threats/cve-2026-25742-zulip-missing-authorization-for-anonymous-access-to-attachments) (medium, CVSS 5.3, published 3 Apr 2026) - [CVE-2026-115574: Zulip custom profile fields information disclosure](https://junglewise.ai/threats/cve-2026-115574-zulip-is-an-open-source-team-collaboration-tool-from-11-0-until) (medium, CVSS 5.3, published 4 Nov 2026) - [CVE-2026-102893: Zulip Server OpenID Connect email verification bypass](https://junglewise.ai/threats/cve-2026-102893-zulip-is-an-open-source-team-collaboration-tool-in-zulip-server) (info, published 14 Oct 2026) ## Vulnerabilities per week 5 vulnerabilities in the last four weeks, up from none in the four before. | 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 | 2 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 3 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Zulip technologies - [Zulip Server](https://junglewise.ai/threats/technologies/zulip-server): 5 vulnerabilities - [Zulip](https://junglewise.ai/threats/technologies/zulip): 4 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, "Zulip vulnerabilities", https://junglewise.ai/threats/vendors/zulip, 12 November 2026.