Vulnerability · Published Feb 6, 2026 · Assigned by GitHub_M

CVE-2026-24050Zulip affected by Stored XSS in user profile modal

Low 1.1

In plain English

A low-severity cross-site scripting in zulip from zulip. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 4.0)1.1Low

Exploit odds (30 days)0.3%top 81.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Zulip 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.

Affected products (as reported)

Vendor	Product	Versions
zulip	zulip	>= 5.0, < 11.5

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U

References

https://github.com/zulip/zulip/security/advisories/GHSA-56qv-8823-6fq9 x_refsource_CONFIRM
https://github.com/zulip/zulip/commit/e6093d9e4788f4d82236d856c5ed7b16767886a7 x_refsource_MISC
https://github.com/zulip/zulip/releases/tag/11.5 x_refsource_MISC
https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-11-5 x_refsource_MISC