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% (15th 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 2026-06-17.

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% (15th 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: 2026-06-17

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% (15th 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 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Zulip

CVE-2021-3967 — High (CVSS 8.8): Improper Access Control in GitHub repository zulip/zulip prior to 4.10.
CVE-2021-43799 — High (CVSS 8.6): Zulip is an open-source team collaboration tool. Zulip Server installs RabbitMQ for internal message passing. In…
CVE-2022-35962 — High (CVSS 8.0): Zulip is an open source team chat and Zulip Mobile is an app for iOS and Andriod users. In Zulip Mobile through version…
CVE-2016-4427 — High (CVSS 7.5): In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
CVE-2023-28623 — Medium (CVSS 6.5): Zulip is an open-source team collaboration tool with unique topic-based threading. In the event that 1:…
CVE-2021-43791 — Medium (CVSS 6.5): Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected…

All CVEs affecting Zulip →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →