How severe is CVE-2026-26058?

CVE-2026-26058 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-26058 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26058?

CVE-2026-26058 affects Zulip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26058?

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

Does CVE-2026-26058 have an EU (EUVD) identifier?

Yes. CVE-2026-26058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18838.

When was CVE-2026-26058 published?

CVE-2026-26058 was published on 2026-04-03 and last updated on 2026-07-24.

CVE-2026-26058

CVE-2026-26058 is a medium-severity vulnerability in Zulip with a CVSS 3.x base score of 6.1. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18838
Weakness: CWE-22
Affected product: Zulip
Published: 2026-04-03
Last modified: 2026-07-24

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-26058?: CVE-2026-26058 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-26058 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26058?: CVE-2026-26058 affects Zulip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26058?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26058 have an EU (EUVD) identifier?: Yes. CVE-2026-26058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18838.
When was CVE-2026-26058 published?: CVE-2026-26058 was published on 2026-04-03 and last updated on 2026-07-24.

References

Affected products (1)

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

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