CVE-2026-30949: Parse server Parse Server Missing Audience Validation Vulnerability

HIGH
Advisory Identifier: GHSA-48mh-j4p5-7j9v
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CWE-287
Published
Advisory Summary

CVE-2026-30949 is a HIGH parse server missing audience validation vulnerability (CWE-287: Improper Authentication) affecting Parse server libraries in the npm ecosystem. The issue involves parse server missing audience validation in keycloak authentication adapter. Remediation is available by upgrading affected packages to version 9.5.2-alpha.5, 8.6.18.

CVE-2026-30949 at a Glance

CVE Identifier CVE-2026-30949
GHSA Identifier GHSA-48mh-j4p5-7j9v
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-287: Improper Authentication
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-30949

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

parse-server fixed: 9.5.2-alpha.5 
npm install parse-server@9.5.2-alpha.5
parse-server fixed: 8.6.18 
npm install parse-server@8.6.18
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 parse-server

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-30949, inspect your project dependencies using npm:

npm ls parse-server

Analyze the terminal output to locate any version of Parse server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.5.2-alpha.5), your application is affected.

Note: The npm ls parse-server 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Parse server, 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

### Impact The Keycloak authentication adapter does not validate the `azp` (authorized party) claim of Keycloak access tokens against the configured `client-id`. A valid access token issued by the same Keycloak realm for a *different* client application can be used to authenticate as any user on the Parse Server that uses the Keycloak adapter. This enables cross-application account takeover in multi-client Keycloak realms. All Parse Server deployments that use the Keycloak authentication adapter with a Keycloak realm that has multiple client applications are affected. ### Patches The fix replaces the userinfo HTTP call with local JWT verification and enforces `azp` claim validation against the configured `client-id`. ### Workarounds None. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.18

CVE-2026-30949 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.5.2-alpha.58.6.18
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.5.2-alpha.5
9.5.2-alpha.5
parse-server
npm/parse-server
npm
< 8.6.18
8.6.18

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v
NVD — CVE-2026-30949 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30949
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server
Parse server Release RELEASE
https://github.com/parse-community/parse-server/releases/tag/8.6.18
Parse server Release RELEASE
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5

Frequently Asked Questions

What is CVE-2026-30949?
CVE-2026-30949 is a security vulnerability in Parse server involving Parse Server missing audience validation in Keycloak authentication adapter under CWE-287: Improper Authentication.
Which Parse server versions are affected?
Affected versions include releases prior to 9.5.2-alpha.5, 8.6.18 across affected packages: parse-server.
What version fixes CVE-2026-30949?
Upgrading to 9.5.2-alpha.5, 8.6.18 (or the latest patched release for your respective branch) resolves the vulnerability.
Is parse-server affected?
Yes, parse-server is affected in releases prior to 9.5.2-alpha.5, 8.6.18. Upgrade your dependency to 9.5.2-alpha.5, 8.6.18 or later.
What CWE is associated with CVE-2026-30949?
CVE-2026-30949 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check npm dependencies for CVE-2026-30949?
Run the dependency tree command: 'npm ls parse-server'. 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-48mh-j4p5-7j9v",
  "modified" : "2026-03-11T00:17:53Z",
  "published" : "2026-03-11T00:17:53Z",
  "aliases" : [ "CVE-2026-30949" ],
  "summary" : "Parse Server missing audience validation in Keycloak authentication adapter",
  "details" : "### Impact\n\nThe Keycloak authentication adapter does not validate the `azp` (authorized party) claim of Keycloak access tokens against the configured `client-id`. A valid access token issued by the same Keycloak realm for a *different* client application can be used to authenticate as any user on the Parse Server that uses the Keycloak adapter. This enables cross-application account takeover in multi-client Keycloak realms.\n\nAll Parse Server deployments that use the Keycloak authentication adapter with a Keycloak realm that has multiple client applications are affected.\n\n### Patches\n\nThe fix replaces the userinfo HTTP call with local JWT verification and enforces `azp` claim validation against the configured `client-id`.\n\n### Workarounds\n\nNone.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.18",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.2-alpha.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.18"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30949"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/releases/tag/8.6.18"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-11T00:17:53Z",
    "nvd_published_at" : "2026-03-10T21:16:47Z"
  }
}