CVE-2026-30848: Parse Server Path Traversal Vulnerability
MODERATECVE-2026-30848 is a MODERATE path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Parse Server libraries in the npm ecosystem. The issue involves `pagesrouter` path traversal allows reading files outside configured pages directory. Remediation is available by upgrading affected packages to version 8.6.8, 9.5.0-alpha.8.
CVE-2026-30848 at a Glance
How to Fix CVE-2026-30848
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.
npm install parse-server@8.6.8npm install parse-server@9.5.0-alpha.8Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls parse-serverHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-30848, inspect your project dependencies using npm:
npm ls parse-serverAnalyze 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 8.6.8), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. 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
CVE-2026-30848 Affected Parse Server Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
parse-server
|
npm |
< 8.6.8
|
8.6.8
|
|
parse-server
|
npm |
≥ 9.0.0-alpha.1
< 9.5.0-alpha.8
|
9.5.0-alpha.8
|
References
Frequently Asked Questions
What is CVE-2026-30848?
Which Parse Server versions are affected?
What version fixes CVE-2026-30848?
Is parse-server affected?
What CWE is associated with CVE-2026-30848?
How can I check npm dependencies for CVE-2026-30848?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-hm3f-q6rw-m6wh",
"modified" : "2026-03-09T17:41:55Z",
"published" : "2026-03-09T17:41:55Z",
"aliases" : [ "CVE-2026-30848" ],
"summary" : "Parse Server: `PagesRouter` path traversal allows reading files outside configured pages directory",
"details" : "### Impact\n\nThe `PagesRouter` static file serving route is vulnerable to a path traversal attack that allows unauthenticated reading of files outside the configured `pagesPath` directory. The boundary check uses a string prefix comparison without enforcing a directory separator boundary. An attacker can use path traversal sequences to access files in sibling directories whose names share the same prefix as the pages directory (e.g. `pages-secret` starts with `pages`).\n\nThis affects any Parse Server deployment with the `pages` feature enabled (`pages.enableRouter: true`). Exploitation requires a sibling directory of `pagesPath` whose name begins with the same string as the pages directory name.\n\n### Patches\n\nThe fix enforces a path separator boundary in the check, ensuring resolved paths must be strictly inside the `pagesPath` directory.\n\n### Workarounds\n\nEnsure the `pagesPath` directory has no sibling directories whose names begin with the same prefix. For example, if `pagesPath` is `/srv/pages`, ensure no directory like `/srv/pages-backup` or `/srv/pages_old` exists alongside it.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh\n- Fix for Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.8\n- Fix for Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.8",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "parse-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.6.8"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "parse-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.0.0-alpha.1"
}, {
"fixed" : "9.5.0-alpha.8"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30848"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/parse-community/parse-server"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-22" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-03-09T17:41:55Z",
"nvd_published_at" : "2026-03-07T17:15:52Z"
}
}