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CVE-2026-86321— java-json-tools jackson-coreutils URL Validation JsonLoader.java JsonLoader.fromURL server-side request forgery

Quick assessment

Affected
java-json-tools jackson-coreutils
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.

在 java-json-tools 的 jackson-coreutils 2.0 中发现了一个漏洞。该问题影响的是组件“URL 验证”中文件 里的 函数。对函数的特定操纵会导致服务器端请求伪造（SSRF）。攻击者可远程发起该攻击。利用方式（exploit）已经公开，且可能被利用。项目方已较早通过问题报告得知该问题，但尚未作出回应。

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
java-json-tools jackson-coreutils 2.0 affected
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I. Basic Information for CVE-2026-86321

Vulnerability Information
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Vulnerability Title
java-json-tools jackson-coreutils URL Validation JsonLoader.java JsonLoader.fromURL server-side request forgery
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in java-json-tools jackson-coreutils 2.0. Affected by this issue is the function JsonLoader.fromURL of the file src/main/java/com/github/fge/jackson/JsonLoader.java of the component URL Validation. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
java-json-tools jackson-coreutils 2.0 cpe:2.3:a:java-json-tools:jackson-coreutils:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-86321

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III. Intelligence Information for CVE-2026-86321

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Proof of Concept for CVE-2026-86321 (1)

News Coverage for CVE-2026-86321 (1)

Other References for CVE-2026-86321 (2)

Same Patch Batch · java-json-tools · 2026-09-07 · 3 CVEs total

CVE-2026-86318 5.3 MEDIUM java-json-tools json-patch JsonMergePatchDeserializer.java JsonMergePatch.fromJson stack-b
CVE-2026-86319 5.3 MEDIUM java-json-tools json-patch Patch Operation JsonPatch.java JsonPatch.apply resource consump

IV. Related Vulnerabilities

Same product: jackson-coreutils
Same vendor: java-json-tools
Same weakness: CWE-918

V. Comments for CVE-2026-86321

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