CVE-2026-126933
Zipline 4.0.0 before 4.8.0 Disabled Extensions Upload Filter Bypass via Extension Format Mismatch
Zipline 4.0.0 before 4.8.0 contains an upload filter bypass vulnerability that allows users with upload access to store blocked file types due to extension format mismatch. The upload and partial handlers compare dotted, case-sensitive extensions against undotted disabledExtensions entries, letting authenticated or permitted unauthenticated folder uploaders bypass administrator restrictions.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| zipline diced diced/zipline
github |
≥ 4.0.0; < 4.8.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
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: VulnCheck |
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/diced/zipline/security/advisories/GHSA-wwrw-gq56-7wpjCNA: VulnCheck · vendor-advisory
- https://github.com/diced/zipline/commit/dbc1fe502130a8ebd95fa04886efec01402e5b5fCNA: VulnCheck · patch
- https://github.com/diced/zipline/releases/tag/v4.8.0CNA: VulnCheck · release-notes
- https://github.com/diced/zipline/blob/v4.7.0/src/server/routes/api/upload/index.ts#L170CNA: VulnCheck · technical-description
- https://github.com/diced/zipline/blob/v4.7.0/src/server/routes/api/upload/partial.ts#L294CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/zipline-4.0.0-before-4.8.0-disabled-extensions-upload-filter-bypass-via-extension-format-mismatchCNA: VulnCheck · third-party-advisory
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