CVE-2026-59652Network attack vector

LDAP query manipulation via unescaped certificate DN

Published Aug 3, 2026 · Updated Aug 3, 2026

LDAP filter injection in Bouncy Castle Java before 1.85 allows remote attackers to alter LDAP directory searches with crafted certificates. The jdk1.4 LDAPStoreHelper.parseDN() path returns raw Subject or Issuer CN text, which callers concatenate into a filter passed to DirContext.search(). Exploitation requires an application to use the legacy jdk14 provider with LDAP certificate lookup and process an attacker-controlled certificate; injected clauses can change which directory entries the CertStore matches.

CVSS severity6.9
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP filter injection in Bouncy Castle Java before 1.85 allows remote attackers to alter LDAP directory searches with crafted certificates. The jdk1.4 LDAPStoreHelper.parseDN() path returns raw Subject or Issuer CN text, which callers concatenate into a filter passed to DirContext.search(). Exploitation requires an application to use the legacy jdk14 provider with LDAP certificate lookup and process an attacker-controlled certificate; injected clauses can change which directory entries the CertStore matches.

The record

CVE
CVE-2026-59652
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
Legion of the Bouncy Castle Inc.
Product
Bouncy Castle Java
Classifications
CWE-90
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.85

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Legion of the Bouncy Castle Inc. · Bouncy Castle Javaversion=0 <1.85

Published CVSS scores

6.9bcorgCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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