How severe is CVE-2026-24050?

CVE-2026-24050 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-24050 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24050?

CVE-2026-24050 affects Zulip Zulip Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24050?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-24050 have an EU (EUVD) identifier?

Yes. CVE-2026-24050 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5640.

When was CVE-2026-24050 published?

CVE-2026-24050 was published on 2026-02-06 and last updated on 2026-06-17.

CVE-2026-24050

CVE-2026-24050 is a medium-severity vulnerability in Zulip Zulip Server with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 1.1
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5640
Weakness: CWE-79
Affected product: Zulip Zulip Server
Published: 2026-02-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-24050?: 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.
How severe is CVE-2026-24050?: CVE-2026-24050 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-24050 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24050?: CVE-2026-24050 affects Zulip Zulip Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24050?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-24050 have an EU (EUVD) identifier?: Yes. CVE-2026-24050 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5640.
When was CVE-2026-24050 published?: CVE-2026-24050 was published on 2026-02-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*

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