Stored XSS Vulnerability in Zulip Collaboration Tool
CVE-2026-24050

1.1LOW

Key Information:

Vendor

Zulip

Status
Zulip
Vendor
CVE Published:
6 February 2026

What is CVE-2026-24050?

An issue was found in the Zulip collaboration tool that allows for stored Cross-Site Scripting (XSS) attacks through group or channel names. Versions from 5.0 up to, but not including, 11.5 are vulnerable when certain administrative actions are performed on user profiles. Attackers could exploit this vulnerability if a user interacts with an affected object. Users are strongly advised to upgrade to version 11.5 where this vulnerability has been resolved.

Affected Version(s)

zulip >= 5.0, < 11.5

References

https://github.com/zulip/zulip/security/advisories/GHSA-5...
x_refsource_CONFIRM
https://github.com/zulip/zulip/commit/e6093d9e4788f4d8223...
x_refsource_MISC
https://github.com/zulip/zulip/releases/tag/11.5
x_refsource_MISC

CVSS V4

Score:
1.1
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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