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CVE-2026-8657

Quick assessment

Affected
n/a jsondiffpatch
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

jsondiffpatch是Benjamín Eidelman个人开发者的一个具有区分和修补JavaScript对象功能的软件。 jsondiffpatch 0.7.6之前版本存在安全漏洞，该漏洞源于jsondiffpatch.patch()和jsondiffpatch/formatters/jsonpatch.patch() API中未限制对__proto__或constructor.prototype等特殊属性的访问，可能导致原型污染攻击。

CVSS 8.2 · High EPSS 0.67% · P50

Affected Version Matrix 2

VendorProduct Version RangeStatus
n/a jsondiffpatch < 0.7.6 affected
n/a org.webjars.npm:jsondiffpatch < * affected
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I. Basic Information for CVE-2026-8657

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Versions of the package jsondiffpatch before 0.7.6 are vulnerable to Prototype Pollution via the jsondiffpatch.patch() and jsondiffpatch/formatters/jsonpatch.patch() APIs. An attacker can perform prototype pollution by supplying crafted delta or JSON Patch documents, as attacker-controlled property names and path segments are used to traverse and modify objects without restricting access to special properties like __proto__ or constructor.prototype, allowing modification of Object.prototype.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
jsondiffpatch 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jsondiffpatch是Benjamín Eidelman个人开发者的一个具有区分和修补JavaScript对象功能的软件。 jsondiffpatch 0.7.6之前版本存在安全漏洞，该漏洞源于jsondiffpatch.patch()和jsondiffpatch/formatters/jsonpatch.patch() API中未限制对__proto__或constructor.prototype等特殊属性的访问，可能导致原型污染攻击。
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
- jsondiffpatch 0 ~ 0.7.6 -
- org.webjars.npm:jsondiffpatch 0 ~ * -

II. Public POCs for CVE-2026-8657

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9238 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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POC zip download
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III. Intelligence Information for CVE-2026-8657

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Patches & Fixes for CVE-2026-8657 (5)

Vendor Advisories for CVE-2026-8657 (2)

Proof of Concept for CVE-2026-8657 (1)

IV. Related Vulnerabilities

Same product: jsondiffpatch
Same vendor: n/a
Same weakness: CWE-1321

V. Comments for CVE-2026-8657

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