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CVE-2026-71247— Documenso - Assistant Recipient Can Forge Another Signer's Signature in Sequential-Signing Documents

Quick assessment

Affected
documenso documenso
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.

Documenso是Documenso团队开源的一款数字文档签署平台。 Documenso存在授权问题漏洞，该漏洞源于sign-field-with-token.ts文件对字段类型和所有权验证不足，可能导致具有ASSISTANT角色的接收者获取并完成同一信封中后续未签名接收者的字段，从而伪造其他签名者的签名字段。

CVSS 6.5 · Medium EPSS 0.30% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
documenso documenso affected
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I. Basic Information for CVE-2026-71247

Vulnerability Information
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Vulnerability Title
Documenso - Assistant Recipient Can Forge Another Signer's Signature in Sequential-Signing Documents
Source: CVE Program / CVE List V5
Vulnerability Description
Documenso's sign-field-with-token.ts, used by the live document-signing UI, allows a recipient with the ASSISTANT role to fetch and complete fields belonging to any later-or-equal-order, not-yet-signed recipient in the same envelope, with no restriction on field type. A newer V2 signing path (sign-envelope-field.ts) explicitly blocks assistants from completing SIGNATURE fields, and the project's own test suite comments confirm this guard is absent from the V1 path used here.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Documenso 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Documenso是Documenso团队开源的一款数字文档签署平台。 Documenso存在授权问题漏洞，该漏洞源于sign-field-with-token.ts文件对字段类型和所有权验证不足，可能导致具有ASSISTANT角色的接收者获取并完成同一信封中后续未签名接收者的字段，从而伪造其他签名者的签名字段。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
documenso documenso 0 -

II. Public POCs for CVE-2026-71247

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III. Intelligence Information for CVE-2026-71247

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Vendor Pages for CVE-2026-71247 (1)

IV. Related Vulnerabilities

Same product: documenso
Same vendor: documenso
Same weakness: CWE-863

V. Comments for CVE-2026-71247

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