CVE-2026-0636Network attack vector

Information disclosure via unchecked X.500 wildcards

Published Apr 15, 2026 · Updated Apr 15, 2026

LDAP injection in Bouncy Castle Java 1.74 through 1.80.1, 1.81, and 1.82 through 1.83 allows context-dependent attackers to disclose LDAP data. LDAPStoreHelper fails to reject wildcard characters in certificate, subject, or issuer X.500 names before incorporating parsed values into LDAP searches. Exposure requires explicit use of the secondary LDAP certificate-processing API with unvetted certificates and permits information disclosure without reported write or service-interruption impact.

CVSS severity6.5
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in Bouncy Castle Java 1.74 through 1.80.1, 1.81, and 1.82 through 1.83 allows context-dependent attackers to disclose LDAP data. LDAPStoreHelper fails to reject wildcard characters in certificate, subject, or issuer X.500 names before incorporating parsed values into LDAP searches. Exposure requires explicit use of the secondary LDAP certificate-processing API with unvetted certificates and permits information disclosure without reported write or service-interruption impact.

The record

CVE
CVE-2026-0636
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
Legion of the Bouncy Castle Inc.
Product
Bouncy Castle Java
Classifications
CWE-90, CAPEC-136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=1.74 <1.84

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Legion of the Bouncy Castle Inc. · Bouncy Castle Javaversion=1.74 <1.84

Published CVSS scores

5.5Legion of the Bouncy Castle Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
6.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
CAPEC-136LDAP 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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