Is CVE-2026-126932 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-126932 being exploited in the wild.

How severe is CVE-2026-126932?

Medium severity, with a CVSS score of 4.3, published 11 November 2026.

Is there a fix for CVE-2026-126932?

Yes: fixed in 4.8.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-126932 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-126932?

Check whether you run Diced Zipline at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-126932: Zipline policy bypass in file metadata MIME type

CVE-2026-126932 · Severity: medium · CVSS 4.3 · Published 2026-11-11

Zipline is a file-sharing application that allows administrators to restrict which file types users can upload. A vulnerability in versions 4.6.2 through 4.8.0 allows authenticated users to bypass these restrictions by editing a file's metadata after upload, changing its MIME type to a disabled type like text/html. This could enable attackers to serve malicious content (such as JavaScript) that browsers execute, leading to account compromise or malware distribution.

Technologies: Diced Zipline. Vendors: Diced.

Quick answers

Is CVE-2026-126932 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-126932 being exploited in the wild.
How severe is CVE-2026-126932?: Medium severity, with a CVSS score of 4.3, published 11 November 2026.
Which products and versions are affected?: Diced Zipline 4.6.2 to 4.8.0.
Is there a fix for CVE-2026-126932?: Yes: fixed in 4.8.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-126932 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-126932?: Check whether you run Diced Zipline at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 4.8.0

Technical details

The PATCH /api/user/files/:id endpoint accepts a user-supplied "type" parameter and updates the file's MIME type without validating it against the administrator's disabled MIME type policy. An authenticated attacker uploads a permitted file, then uses PATCH to change its type to a disabled value like text/html; when the file is served via /raw/:id, the browser renders it with the spoofed Content-Type. The fix (commit fc8e886) adds enforceMimetypePolicy() validation to the type field during metadata updates.

Affected products

diced Zipline 4.6.2 to 4.8.0

Timeline

2026-11-11: disclosed

References

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