GHSA-xw57-23p8-9wc5: @asymmetric-effort/specifyjs Localhost Bypass Incomplete (IPv6, 0.0.0.0, Vulnerability

MODERATE
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CWE-918
Published
Advisory Summary

GHSA-xw57-23p8-9wc5 is a MODERATE localhost bypass incomplete (ipv6, 0.0.0.0, vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting @asymmetric-effort/specifyjs libraries in the npm ecosystem. The issue involves localhost bypass incomplete (ipv6, 0.0.0.0, 127.x range). Remediation is available by upgrading affected packages to version 0.2.136.

GHSA-xw57-23p8-9wc5 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-xw57-23p8-9wc5
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product @asymmetric-effort/specifyjs
Package Ecosystem npm
Published Date
Last Updated

How to Fix GHSA-xw57-23p8-9wc5

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

@asymmetric-effort/specifyjs fixed: 0.2.136 
npm install @asymmetric-effort/specifyjs@0.2.136
Verify Direct and Transitive Dependencies

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

npm ls @asymmetric-effort/specifyjs

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-xw57-23p8-9wc5, inspect your project dependencies using npm:

npm ls @asymmetric-effort/specifyjs

Analyze the terminal output to locate any version of @asymmetric-effort/specifyjs in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.136), your application is affected.

Note: The npm ls @asymmetric-effort/specifyjs command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

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 @asymmetric-effort/specifyjs, 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

## Finding **Location**: `core/src/shared/secure-fetch.ts:52-54` The localhost exception allowed `localhost` and `127.0.0.1` but did not cover `0.0.0.0`, `[::1]` (IPv6 localhost), or the full `127.0.0.0/8` loopback range. ## Status **Fixed in v0.2.136** — Localhost detection now covers `localhost`, `127.0.0.1`, `[::1]`, `0.0.0.0`, and the full `127.x.x.x` range.

GHSA-xw57-23p8-9wc5 Affected @asymmetric-effort/specifyjs Versions

1 component(s)
Fixed Versions:
0.2.136
Product / Package Ecosystem Affected Versions Fixed Version
@asymmetric-effort/specifyjs
npm/@asymmetric-effort/specifyjs
npm
< 0.2.136
0.2.136

References

GitHub Advisory / Wiki ADVISORY
https://github.com/asymmetric-effort/specifyjs/security/advisories/GHSA-xw57-23p8-9wc5
Security Fix Commit FIX COMMIT
https://github.com/asymmetric-effort/specifyjs/commit/25d1fb491d99479efdf501f5f75e0bb80c908f0a
Security Fix Commit FIX COMMIT
https://github.com/asymmetric-effort/specifyjs/commit/293124c51bf797c0f5cdae32981110545850a893
@asymmetric-effort/specifyjs Source Repository REPOSITORY
https://github.com/asymmetric-effort/specifyjs

Frequently Asked Questions

What is GHSA-xw57-23p8-9wc5?
GHSA-xw57-23p8-9wc5 is a security vulnerability in @asymmetric-effort/specifyjs involving Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range) under CWE-918: Server-Side Request Forgery (SSRF).
Which @asymmetric-effort/specifyjs versions are affected?
Affected versions include releases prior to 0.2.136 across affected packages: @asymmetric-effort/specifyjs.
What version fixes GHSA-xw57-23p8-9wc5?
Upgrading to 0.2.136 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @asymmetric-effort/specifyjs affected?
Yes, @asymmetric-effort/specifyjs is affected in releases prior to 0.2.136. Upgrade your dependency to 0.2.136 or later.
What CWE is associated with GHSA-xw57-23p8-9wc5?
GHSA-xw57-23p8-9wc5 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 npm dependencies for GHSA-xw57-23p8-9wc5?
Run the dependency tree command: 'npm ls @asymmetric-effort/specifyjs'. 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-xw57-23p8-9wc5",
  "modified" : "2026-07-02T19:07:22Z",
  "published" : "2026-07-02T19:07:22Z",
  "aliases" : [ ],
  "summary" : "@asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)",
  "details" : "## Finding\n\n**Location**: `core/src/shared/secure-fetch.ts:52-54`\n\nThe localhost exception allowed `localhost` and `127.0.0.1` but did not cover `0.0.0.0`, `[::1]` (IPv6 localhost), or the full `127.0.0.0/8` loopback range.\n\n## Status\n\n**Fixed in v0.2.136** — Localhost detection now covers `localhost`, `127.0.0.1`, `[::1]`, `0.0.0.0`, and the full `127.x.x.x` range.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@asymmetric-effort/specifyjs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.2.136"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/asymmetric-effort/specifyjs/security/advisories/GHSA-xw57-23p8-9wc5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/asymmetric-effort/specifyjs/commit/25d1fb491d99479efdf501f5f75e0bb80c908f0a"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/asymmetric-effort/specifyjs/commit/293124c51bf797c0f5cdae32981110545850a893"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/asymmetric-effort/specifyjs"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-02T19:07:22Z",
    "nvd_published_at" : null
  }
}