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Advisory details: gitlab / maven/org.bouncycastle/bcprov-jdk18on/CVE-2026-0636
Advisory ID gitlab/maven/org.bouncycastle/bcprov-jdk18on/CVE-2026-0636
Aliases CVE-2026-0636
GHSA-c3fc-8qff-9hwx
Summary Bouncy Castle has an LDAP injection Improper neutralization of special elements used in an LDAP query ('LDAP injection') vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (prov modules). This vulnerability is associated with program files LDAPStoreHelper. This issue affects BC-JAVA: from 1.74 before 1.84.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-90 Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.bouncycastle/bcprov-jdk18on/CVE-2026-0636.yml
Reference id Reference type URL
https://nvd.nist.gov/vuln/detail/CVE-2026-0636
CVE%E2%80%902026%E2%80%900636 Advisory https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%900636
d20cdb8430e09224114fec0179a71859929fcbde Other https://github.com/bcgit/bc-java/commit/d20cdb8430e09224114fec0179a71859929fcbde
GHSA-c3fc-8qff-9hwx https://github.com/advisories/GHSA-c3fc-8qff-9hwx
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.bouncycastle/bcprov-jdk18on/CVE-2026-0636.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-15T13:12:14Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/0xxx/CVE-2026-0636.json

Source Advisory: vulnrichment/CVE-2026-0636

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]