CVE-2026-126932 json
Zipline 4.6.2 before 4.8.0 Disabled MIME Type Policy Bypass via File Metadata Update
published last mo. modified 11h ago also GHSA-rgxm-54cf-whf7 , EUVD-2026-124142
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository diced/zipline. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no EPSS score yet
- public exploits
- 0
- none known
Summary
Zipline 4.6.2 before 4.8.0 contains a policy bypass vulnerability that allows authenticated users to evade administrator-disabled MIME types by editing file metadata. Attackers can upload a permitted file, then set a disabled type such as text/html through PATCH /api/user/files/:id so /raw/:id serves that Content-Type.
Patch / fix
- diced zipline 4.8.0
Is CVE-2026-126932 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- diced zipline
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/diced/zipline/commit/fc8e886ca841b86a3f677cd7dac1bf9a5bd45b2c
patch
-
github.com
/diced/zipline/security/advisories/GHSA-rgxm-54cf-whf7
vendor-advisory, advisory
-
github.com
/diced/zipline/releases/tag/v4.8.0
release-notes
-
github.com
/diced/zipline/blob/v4.7.0/src/server/routes/api/user/files/%5Bid%5D/index.ts#L96
technical-description
-
vulncheck.com
/advisories/zipline-4.6.2-before-4.8.0-disabled-mime-type-policy-bypass-via-file-metadata-update
third-party-advisory
Sources
- CVE List CVE-2026-126932
- NVD CVE-2026-126932
- Maintainer advisory GHSA-rgxm-54cf-whf7
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of diced/zipline published their own advisory on GitHub. Reviewed sources take precedence over it.