What is CVE-2026-26058?

CVE-2026-26058 is a medium-severity vulnerability in Zulip, classified under Path Traversal. CVSS score: 6.1/10. Published 2026-04-03.

How severe is CVE-2026-26058?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Path Traversal in Zulip

CVE-2026-26058

Zulip 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.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.002 (14.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N.

Affected products

Zulip — versions >= 1.4.0, < 11.6

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-26058?: CVE-2026-26058 is a medium-severity vulnerability in Zulip, classified under Path Traversal. CVSS score: 6.1/10. Published 2026-04-03.
How severe is CVE-2026-26058?: Medium severity. CVSS v3 base score is 6.1 out of 10.