CVE-2026-126932— Zipline 4.6.2 before 4.8.0 Disabled MIME Type Policy Bypass via File Metadata Update

Quick assessment

Affected

diced zipline

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zipline 4.6.2 至 4.8.0（不含 4.8.0）版本中存在一个策略绕过漏洞。该漏洞允许已认证用户通过修改文件元数据，规避管理员已禁用的 MIME 类型。攻击者可先上传一个被允许的文件，随后通过接口将文件类型设置为已禁用的类型（如），从而使得接口以该指定 Content-Type 返回文件内容。

CVSS 4.3 · Medium Updated Nov 12, 2026

Possible ATT&CK Techniques 2 AI

T1566.001 · Spearphishing Attachment T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Zipline 4.6.2 before 4.8.0 Disabled MIME Type Policy Bypass via File Metadata Update

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

危险类型文件的不加限制上传

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
diced	zipline	4.6.2 ~ 4.8.0	-

II. Public POCs for CVE-2026-126932

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-126932

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Other References for CVE-2026-126932 (5)

https://github.com/diced/zipline/commit/fc8e886ca841b86a3f677cd7dac1bf9a5bd45b2c patch
https://github.com/diced/zipline/blob/v4.7.0/src/server/routes/api/user/files/%5Bid%5D/index.ts#L96 technical-description
https://github.com/diced/zipline/releases/tag/v4.8.0 release-notes
https://github.com/diced/zipline/security/advisories/GHSA-rgxm-54cf-whf7 vendor-advisory
https://www.vulncheck.com/advisories/zipline-4.6.2-before-4.8.0-disabled-mime-type-policy-bypass-via-file-metadata-update third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-126932

Same Patch Batch · diced · 2026-11-11 · 4 CVEs total

CVE-2026-126934	6.5 MEDIUM	Zipline 4.3.2 before 4.8.0 Rate Limit Bypass via Spoofed X-Forwarded-For
CVE-2026-126933	4.3 MEDIUM	Zipline 4.0.0 before 4.8.0 Disabled Extensions Upload Filter Bypass via Extension Format M
CVE-2026-126935	3.7 LOW	Zipline before 4.8.0 maxViews Limit Bypass via Race Condition

IV. Related Vulnerabilities

Same product: zipline

Same vendor: diced

Same weakness: CWE-434