Parse Server vulnerable to LDAP injection via unsanitized user input in DN and group filter construction

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-31828: 0.45% estimated exploitation activity in the next 30 days; percentile 39.08 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact The LDAP authentication adapter is vulnerable to LDAP injection. User-supplied input (authData.id) is interpolated directly into LDAP Distinguished Names (DN) and group search filters without escaping special characters. This allows an attacker with valid LDAP credentials to manipulate the bind DN structure and to bypass group membership checks. This enables privilege escalation from any authenticated LDAP user to a member of any restricted group. The vulnerability affects Parse Server deployments that use the LDAP authentication adapter with group-based access control. Patches The vulnerability is fixed by escaping user input before interpolation into DN strings (per RFC 4514) and LDAP filter strings (per RFC 4515). Workarounds There is no known workaround. References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-7m6r-fhh7-r47c - Fix Parse Server 9:…

Published by the source

11 Mar 2026, 00:23 UTC

Last modified by the source

14 Mar 2026, 03:41 UTC

Source last checked

26 Oct 2026, 12:43 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-7m6r-fhh7-r47c

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-7m6r-fhh7-r47c

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# Patch Next advisory brief: CVE-2026-31828

Advisory: Parse Server vulnerable to LDAP injection via unsanitized user input in DN and group filter construction
IDs: CVE-2026-31828, GHSA-7m6r-fhh7-r47c
Record: https://patchnext.com/advisories/cve-2026-31828 (revision 3, source checked 26 Oct 2026, 12:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: parse-server 9.5.2-alpha.13, 8.6.26. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm parse-server: affected >= 9.0.0-alpha.1, < 9.5.2-alpha.13; < 8.6.26; fixed in 9.5.2-alpha.13, 8.6.26

## Suggested inspection (read-only)
- `npm ls parse-server --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on parse-server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-7m6r-fhh7-r47c (OSV record GHSA-7m6r-fhh7-r47c lists affected ranges: npm parse-server >=9.0.0-alpha.1 =0 <8.6.26 (fixed))
- Verified: https://github.com/advisories/GHSA-7m6r-fhh7-r47c (GitHub-reviewed advisory GHSA-7m6r-fhh7-r47c lists affected ranges: npm parse-server >=9.0.0-alpha.1 =0 <8.6.26)

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