CVE-2026-0636
Description
A flaw was found in Legion of the Bouncy Castle Inc. BC-JAVA bcprov. The LDAPStoreHelper implementation fails to properly neutralize special elements in user-supplied input before incorporating them into LDAP queries. This allows a remote attacker to execute an LDAP injection attack by supplying crafted input, potentially leading to disclosure of sensitive information or the manipulation of directory search queries.
Statement
To exploit this issue, an attacker needs to submit crafted input to an application using the LDAPStoreHelper implementation for directory queries. An attack typically requires the application to pass the malicious input directly into a search filter, allowing the attacker to modify the resulting LDAP query.
The primary impact of this vulnerability is the loss of confidentiality and integrity for directory data. This can allow an attacker to bypass search restrictions and manipulate directory results, potentially leading to unauthorized access or privilege escalation.
Mitigation
To mitigate this flaw, sanitize all user-supplied input to remove or escape LDAP special characters before passing it to the LDAPStoreHelper for directory queries. If the input contains unexpected metacharacters such as asterisks, parentheses or backslashes, reject the request or escape the characters.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | N/A | 6.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Understanding the Weakness (CWE)
Confidentiality,Integrity,Availability
Technical Impact: Execute Unauthorized Code or Commands; Read Application Data; Modify Application Data
An attacker could include input that changes the LDAP query which allows unintended commands or code to be executed, allows sensitive data to be read or modified or causes other unintended behavior.
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