Zulip
Vulnerability activity for Zulip: what is being exploited, what was published lately, and when the next patch release is due.
Last 30 days
- CVEs
- 5
- Critical (CVSS 9+)
- 1
- Exploited (CISA KEV)
- 0
- With exploit code
- 1
Last 90 days
- CVEs
- 5
- Critical (CVSS 9+)
- 1
- Exploited (CISA KEV)
- 0
- With exploit code
- 1
Last 365 days
- CVEs
- 9
- Critical (CVSS 9+)
- 1
- Exploited (CISA KEV)
- 0
- With exploit code
- 1
Exploited now
None of this vendor's CVEs are on CISA's known-exploited list.
Recent
- 5.3MediumNov 4, 2026zulip Auth bypass / access controlCVE-2026-115574Zulip is an open-source team collaboration tool. From 11.0 until 12.2, organizations with web-public channels enabled exposed the GET /json/users endpoint to logged-out spectators, and a missing access-control check allowed include_custom_profile_fields=true to return every user's custom profile field values in addition to the documented limited directory data. This exposed those custom profile field values to unauthenticated visitors. This issue is fixed in version 12.2.Exploit codeNucleiDetection
- 6.5MediumNov 4, 2026zulip Auth bypass / access controlCVE-2026-115474Zulip is an open-source team collaboration tool. From 8.0 until 12.2, in organizations where the Who can view all other users in the organization setting restricted guests from viewing other users, saving or editing a direct message draft did not verify that the sender could access the draft recipients. A guest could thereby gain access to otherwise restricted users' profile information without sending a message. Organizations that did not restrict guest access were unaffected. This issue is fix
- 6.5MediumNov 4, 2026zulip Denial of serviceCVE-2026-97701Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, the authenticated POST /messages/render endpoint renders the content parameter without enforcing the normal message length limit used by message send and edit operations. An authenticated user can submit Markdown up to the server body-size limit, causing disproportionate backend CPU consumption, and repeated or concurrent requests can degrade Markdown rendering performance or backend availability for other us
- 9.1CriticalOct 14, 2026zulip Auth bypass / access controlCVE-2026-102893Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, GenericOpenIdConnectBackend matches the identity provider email claim to an active account's delivery_email without rejecting an explicitly false email_verified claim. If a configured identity provider returns an email address that the authenticating user does not control together with email_verified=false, Zulip can log the user into the existing account for that address. Exploitation requires a misconfigure
- 6.5MediumOct 14, 2026zulip Auth bypass / access controlCVE-2026-100404Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, guest users can receive new message events for public channels outside their subscriptions. A guest can trigger the issue by registering an event queue with parameters that request messages from an unsubscribed public channel, or an existing event queue can remain affected after the guest's access to the channel is removed. The flaw discloses new public-channel messages to the guest. This issue is fixed in ve
- 6.5MediumMay 12, 2026zulip server Auth bypass / access controlCVE-2026-40300Zulip is an open-source team collaboration tool. Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages. This vulnerability is fixed in 12.0.
- 6.1MediumApr 3, 2026zulip Path traversal / file handlingCVE-2026-26058Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, ./manage.py import reads arbitrary files from the server filesystem via path traversal in uploads/records.json. A crafted export tarball causes the server to copy any file the zulip user can read into the uploads directory during import. This issue has been patched in version 11.6.
- 5.3MediumApr 3, 2026zulip Auth bypass / access controlCVE-2026-25742Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, even after spectator access (enable_spectator_access / WEB_PUBLIC_STREAMS_ENABLED) is disabled, attachments originating from web-public streams can still be retrieved anonymously. As a result, file contents remain accessible even after public access is intended to be disabled. Similarly, even after spectator access is disabled, the /u
- 5.4MediumFeb 6, 2026zulip server XSSCVE-2026-24050Zulip is an open-source team collaboration tool. From 5.0 to before 11.5, some administrative actions on the user profile were susceptible to stored XSS in group names or channel names. Exploiting these vulnerabilities required the user explicitly interacting with the problematic object. This vulnerability is fixed in 11.5.
Top products
- zulip7 CVEs in the last year, 1 critical
- zulip server2 CVEs in the last year
Counts cover CVEs and advisories Watch Floor tracks, by the date they became news. Updated every 10 minutes.