CVE-2026-31828: Parse Server LDAP Injection Vulnerability
Summary
CVE-2026-31828: Impact The LDAP authentication adapter is vulnerable to LDAP injection. Affects parse-server across 2 version ranges.
< 8.6.26
>= 9.0.0-alpha.1, < 9.5.2-alpha.13
Fixed in 8.6.26 or 9.5.2-alpha.13, depending on the release line you run. How to fix ↓
Also tracked for
- parse · Bitnami
The same CVE-2026-31828 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Parse Server is an open-source backend framework that enables developers to build applications with ease. It provides features such as user authentication, data storage, and real-time notifications. However, it is vulnerable to LDAP injection when using the LDAP authentication adapter, particularly in deployments that implement group-based access control.
Vulnerability Detail
The LDAP authentication adapter in Parse Server is susceptible to LDAP injection due to unsanitized user input in the construction of Distinguished Names (DN) and group search filters. This vulnerability allows an attacker with valid LDAP credentials to manipulate the DN structure, potentially bypassing group membership checks and escalating privileges from any authenticated LDAP user to a member of any restricted group. The issue arises from directly interpolating user-supplied input into DN and filter strings without proper escaping, violating standards outlined in RFC 4514 and RFC 4515.
How To Fix
Latest published version: 9.10.5 as of 22 Oct 2026
npm install parse-server@9.10.5Upgrading to it may include breaking changes; the versions below are the minimum fixed release for this vulnerability.
If you can't move to the latest
The minimum fixed version depends on the release line you run.
-
< 8.6.268.6.26npm install parse-server@8.6.26 -
>= 9.0.0-alpha.1, < 9.5.2-alpha.139.5.2-alpha.13npm install parse-server@9.5.2-alpha.13
Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →
Workaround
There is no known workaround for this vulnerability. The best course of action is to apply the patches provided in the updated versions of the Parse Server.
Conclusion
The LDAP injection vulnerability in Parse Server poses a significant risk to applications utilizing the LDAP authentication adapter. It is crucial to update to the patched versions to safeguard against potential privilege escalation attacks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.
See every vulnerability recorded for parse-server →
FAQ
LDAP injection is a type of attack that allows an attacker to manipulate LDAP queries by injecting malicious input, potentially leading to unauthorized access or privilege escalation.
Any deployment of Parse Server that uses the LDAP authentication adapter with group-based access control is affected by this vulnerability.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit the Vulert playground at Vulert Scanner to check if your application is affected without needing to sign up.
An attacker could exploit this vulnerability to escalate privileges, gaining access to restricted groups and potentially sensitive data.
Currently, there are no known workarounds to mitigate this issue. Updating to the patched versions is the recommended solution.
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