CVE-2024-56136

/api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server

Description

Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.12%
Third-Party Advisory github.com
Affected: zulip zulip
Published at:
Updated at:

References

Link Tags
https://github.com/zulip/zulip/security/advisories/GHSA-5xg8-xhfj-4hm6 third party advisory
https://github.com/zulip/zulip/commit/c6334a765b1e6d71760e4a3b32ae5b8367f2ed4d patch

Frequently Asked Questions

What is the severity of CVE-2024-56136?
CVE-2024-56136 has been scored as a medium severity vulnerability.
How to fix CVE-2024-56136?
To fix CVE-2024-56136, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-56136 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-56136 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-56136?
CVE-2024-56136 affects zulip zulip.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.