Vulnerabilities in pkg:npm/@asymmetric-effort/specifyjs

PACKAGE
Advisory Identifier: GHSA-93q6-wwjh-jc6h
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Advisory Summary

CVE-2026-50290 is a MODERATE css expression sanitization is bypassable vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting @asymmetric-effort/specifyjs libraries in the npm ecosystem. The issue involves css expression sanitization is bypassable in rendertostring. Remediation is available by upgrading affected packages to version 0.2.136.

7 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/@asymmetric-effort/specifyjs

7 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/@asymmetric-effort/specifyjs. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-93q6-wwjh-jc6h CVE-2026-50290 MODERATE @asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString
GHSA-j5qp-p44g-2m49 - MODERATE @asymmetric-effort/specifyjs: No redirect target validation in secureFetch
GHSA-2944-57xv-2682 - MODERATE @asymmetric-effort/specifyjs: `data:` URI allowed without size restriction
GHSA-xw57-23p8-9wc5 - MODERATE @asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)
GHSA-qcr8-x557-7cp3 - MODERATE @asymmetric-effort/specifyjs: Production console warnings may leak internal framework state
GHSA-5c7w-4wm3-85vw - MODERATE @asymmetric-effort/specifyjs: GraphQL gql tag allows metacharacter injection
GHSA-8882-frvv-92w4 CVE-2026-50288 HIGH @asymmetric-effort/specifyjs: URL parse failure silently allows request

CVE-2026-50290 at a Glance

CVE Identifier CVE-2026-50290
GHSA Identifier GHSA-93q6-wwjh-jc6h
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product @asymmetric-effort/specifyjs
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-50290

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 CVE-2026-50290, 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. 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/server/render-to-string.ts:307-311` CSS value sanitization stripped `expression(` and `url(javascript:` using simple regex, but could be bypassed with CSS unicode escapes (`\65xpression(`), null bytes, or CSS comments (`exp/**/ression(`). **Mitigating Factor**: These CSS injection vectors only work in legacy browsers (IE6-IE10). SpecifyJS targets modern browsers. ## Status **Fixed in v0.2.136** — CSS sanitization now normalizes unicode escapes and strips CSS comments before pattern matching. Also checks for `behavior:`, `-moz-binding`, and `-o-link` patterns.

CVE-2026-50290 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-93q6-wwjh-jc6h
Security Fix Commit FIX COMMIT
https://github.com/asymmetric-effort/specifyjs/commit/25d1fb491d99479efdf501f5f75e0bb80c908f0a
@asymmetric-effort/specifyjs Source Repository REPOSITORY
https://github.com/asymmetric-effort/specifyjs

Frequently Asked Questions

What is CVE-2026-50290?
CVE-2026-50290 is a security vulnerability in @asymmetric-effort/specifyjs involving CSS expression sanitization is bypassable in renderToString under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
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 CVE-2026-50290?
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 CVE-2026-50290?
CVE-2026-50290 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-50290?
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-93q6-wwjh-jc6h",
  "modified" : "2026-07-02T19:08:45Z",
  "published" : "2026-07-02T19:08:45Z",
  "aliases" : [ "CVE-2026-50290" ],
  "summary" : "@asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString",
  "details" : "## Finding\n\n**Location**: `core/src/server/render-to-string.ts:307-311`\n\nCSS value sanitization stripped `expression(` and `url(javascript:` using simple regex, but could be bypassed with CSS unicode escapes (`\\65xpression(`), null bytes, or CSS comments (`exp/**/ression(`).\n\n**Mitigating Factor**: These CSS injection vectors only work in legacy browsers (IE6-IE10). SpecifyJS targets modern browsers.\n\n## Status\n\n**Fixed in v0.2.136** — CSS sanitization now normalizes unicode escapes and strips CSS comments before pattern matching. Also checks for `behavior:`, `-moz-binding`, and `-o-link` patterns.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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-93q6-wwjh-jc6h"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/asymmetric-effort/specifyjs/commit/25d1fb491d99479efdf501f5f75e0bb80c908f0a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/asymmetric-effort/specifyjs"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-02T19:08:45Z",
    "nvd_published_at" : null
  }
}