CVE-2026-18647: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-4xp8-858j-g46w
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CVSS 7.3
CWE-918
Published
Advisory Summary

CVE-2026-18647 is a MODERATE (CVSS 7.3) security vulnerability vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Software libraries in the Maven ecosystem. The weakness occurs when the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-18647 at a Glance

CVE Identifier CVE-2026-18647
GHSA Identifier GHSA-4xp8-858j-g46w
Severity MODERATE
CVSS v3.1 Base Score 7.3
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-18647

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-18647, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A security vulnerability has been detected in jina-ai reader up to 1574bfd380d249c86c82db4dace0d9c8fe17e2b1. This issue affects the function isValidTLD of the file /backend/functions/src/cloud-functions/crawler.ts of the component Crawler/Puppeteer. The manipulation leads to server-side request forgery. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The vendor was contacted early about this disclosure but did not respond in any way.

References

NVD — CVE-2026-18647 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18647
Software Source Repository REPOSITORY
https://github.com/orionyan520/cve_report/issues/8
vuldb.com/cve/cve-2026-18647 WEB
https://vuldb.com/cve/CVE-2026-18647
vuldb.com/submit/855011 WEB
https://vuldb.com/submit/855011
vuldb.com/vuln/385566 WEB
https://vuldb.com/vuln/385566
vuldb.com/vuln/385566/cti WEB
https://vuldb.com/vuln/385566/cti

Frequently Asked Questions

What is CVE-2026-18647?
CVE-2026-18647 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-918: Server-Side Request Forgery (SSRF).
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-18647?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-18647?
CVE-2026-18647 has a CVSS v3.1 base score of 7.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-18647?
CVE-2026-18647 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Maven dependencies for CVE-2026-18647?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4xp8-858j-g46w",
  "modified" : "2026-08-03T21:31:37Z",
  "published" : "2026-08-03T21:31:37Z",
  "aliases" : [ "CVE-2026-18647" ],
  "details" : "A security vulnerability has been detected in jina-ai reader up to 1574bfd380d249c86c82db4dace0d9c8fe17e2b1. This issue affects the function isValidTLD of the file /backend/functions/src/cloud-functions/crawler.ts of the component Crawler/Puppeteer. The manipulation leads to server-side request forgery. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The vendor was contacted early about this disclosure but did not respond in any way.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-18647"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/orionyan520/cve_report/issues/8"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/cve/CVE-2026-18647"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/855011"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/385566"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/385566/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-03T21:16:37Z"
  }
}