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VulnerabilityPublished Updated

CVE-2026-0636: Org.bouncycastle:bcprov jdk14: Bouncy Castle has an LDAP injection

Affects org.bouncycastle:bcprov-jdk14Source GCVE Database

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Authoritative record:CVE-2026-0636· Medium 5.5

Public exploit available · CVSS 5.5 Medium : upgrade to 1.80.2 as a priority.

Data as of 4 Nov 2026, 04:28 UTC

CVSS 4.0 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.80.2, 1.81.1, 1.84
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Upgrade org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15to18 and org.bouncycastle:bcprov-jdk18on to 1.80.2; org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15to18 and org.bouncycastle:bcprov-jdk18on to 1.81.1; org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15to18 and org.bouncycastle:bcprov-jdk18on to 1.84.

Affected software

ProductAffectedFixed in
Mavenorg.bouncycastle:bcprov-jdk14Affected
  • >=1.74 <1.80.2
Fixed in
  • 1.80.2
Mavenorg.bouncycastle:bcprov-jdk15to18Affected
  • >=1.74 <1.80.2
Fixed in
  • 1.80.2
Mavenorg.bouncycastle:bcprov-jdk18onAffected
  • >=1.74 <1.80.2
Fixed in
  • 1.80.2
Mavenorg.bouncycastle:bcprov-jdk14Affected
  • >=1.81 <1.81.1
Fixed in
  • 1.81.1
Mavenorg.bouncycastle:bcprov-jdk15to18Affected
  • >=1.81 <1.81.1
Fixed in
  • 1.81.1
Mavenorg.bouncycastle:bcprov-jdk18onAffected
  • >=1.81 <1.81.1
Fixed in
  • 1.81.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Patches are available and should be applied. Fixed versions are 1.80.2, 1.81.1, and 1.84 of the bcprov library. Red Hat has released security advisories with updates for affected products, including Red Hat build of Quarkus and OpenShift Developer Tools. Users should upgrade to these fixed versions to remediate the vulnerability. No additional mitigation is required beyond applying the official patches.

Description

An LDAP injection vulnerability (CVE-2026-0636) exists in the Legion of the Bouncy Castle Inc. BC-JAVA bcprov library, specifically in the LDAPStoreHelper program files. This flaw affects versions 1.74 through 1.80.1, 1.81, and 1.82 through 1.83. The vulnerability allows improper neutralization of special elements in LDAP queries. Fixed versions include 1.80.2, 1.81.1, and 1.84. The CVSS v3.1 base score is 6.5, indicating a medium severity impact with potential confidentiality and integrity loss but no availability impact. Red Hat has issued security advisories with patches available for affected products.

References

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