CVE-2026-30848

Description

### Impact The `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`). This 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. ### Patches The fix enforces a path separator boundary in the check, ensuring resolved paths must be strictly inside the `pagesPath` directory. ### Workarounds Ensure 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. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh - Fix for Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.8 - Fix for Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.8

How to fix CVE-2026-30848

To remediate CVE-2026-30848, upgrade the affected package to a fixed version below.

• —upgrade to 9.5.0 or later
• —upgrade to 8.6.8 or later

Is CVE-2026-30848 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 9.5.0
• from 0, < 8.6.8

CVSS scores

References (3)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-30848
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh