Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.32% for the current model date.
BlackTreeCVE IntelligenceLegion of the Bouncy Castle Inc. · BC-JAVA
Critical technical severity; prioritise exposed affected systems while verifying vendor guidance.
ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Ubuntu 24.04 LTSnoble · esm-apps | bouncycastle | Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing. | Not published in this feed | Canonical Ubuntu Security ↗Source updated 5 Oct 2026 |
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
| Ecosystem and package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| Mavenorg.bouncycastle:bcprov-debug-jdk14 | ECOSYSTEM: introduced 1.59; last affected 1.80.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-debug-jdk14 | ECOSYSTEM: introduced 1.82; fixed 1.84 | 1.84 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-debug-jdk15on | ECOSYSTEM: introduced 0; last affected 1.7.0 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-debug-jdk15to18 | ECOSYSTEM: introduced 1.59; last affected 1.80.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-debug-jdk15to18 | ECOSYSTEM: introduced 1.82; fixed 1.84 | 1.84 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-debug-jdk18on | ECOSYSTEM: introduced 1.59; last affected 1.80.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-debug-jdk18on | ECOSYSTEM: introduced 1.82; fixed 1.84 | 1.84 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-ext-debug-jdk14 | ECOSYSTEM: introduced 1.59; last affected 1.74 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-ext-debug-jdk15to18 | ECOSYSTEM: introduced 1.59; last affected 1.77 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-ext-debug-jdk18on | ECOSYSTEM: introduced 1.59; last affected 1.77 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-ext-jdk14 | ECOSYSTEM: introduced 1.59; last affected 1.78.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-ext-jdk15to18 | ECOSYSTEM: introduced 1.59; last affected 1.78.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-ext-jdk18on | ECOSYSTEM: introduced 1.59; last affected 1.78.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk14 | ECOSYSTEM: introduced 1.59; last affected 1.80.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk14 | ECOSYSTEM: introduced 1.82; fixed 1.84 | 1.84 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk15on | ECOSYSTEM: introduced 0; last affected 1.7.0 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk15to18 | ECOSYSTEM: introduced 1.59; last affected 1.80.1 | Not stated | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk15to18 | ECOSYSTEM: introduced 1.82; fixed 1.84 | 1.84 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk18on | ECOSYSTEM: introduced 1.59; fixed 1.80.2 | 1.80.2 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk18on | ECOSYSTEM: introduced 1.81.0; fixed 1.81.1 | 1.81.1 | OSV record ↗aggregator derived · 24 Sep 2026 |
| Mavenorg.bouncycastle:bcprov-jdk18on | ECOSYSTEM: introduced 1.82; fixed 1.84 | 1.84 | OSV record ↗aggregator derived · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk14 | >= 1.59, <= 1.80.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk14 | = 1.81.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk14 | >= 1.82, <= 1.83 | 1.84 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk15on | <= 1.7.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk15to18 | >= 1.59, <= 1.80.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk15to18 | = 1.81.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk15to18 | >= 1.82, <= 1.83 | 1.84 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk18on | >= 1.59, <= 1.80.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk18on | = 1.81.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-debug-jdk18on | >= 1.82, <= 1.83 | 1.84 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-ext-debug-jdk14 | >= 1.59, <= 1.74 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-ext-debug-jdk15to18 | >= 1.59, <= 1.77 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-ext-debug-jdk18on | >= 1.59, <= 1.77 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-ext-jdk14 | >= 1.59, <= 1.78.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-ext-jdk15to18 | >= 1.59, <= 1.78.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-ext-jdk18on | >= 1.59, <= 1.78.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk14 | >= 1.59, <= 1.80.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk14 | = 1.81.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk14 | >= 1.82, <= 1.83 | 1.84 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk15on | <= 1.7.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk15to18 | >= 1.59, <= 1.80.1 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk15to18 | = 1.81.0 | Not stated | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk15to18 | >= 1.82, <= 1.83 | 1.84 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk18on | >= 1.59, <= 1.80.1 | 1.80.2 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk18on | = 1.81.0 | 1.81.1 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
| mavenorg.bouncycastle:bcprov-jdk18on | >= 1.82, <= 1.83 | 1.84 | GitHub advisory ↗github reviewed aggregator · 24 Sep 2026 |
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
The vendor explicitly identifies these products as affected by this CVE.
Critical technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules). This vulnerability is associated with program files G3413CTRBlockCipher. This issue affects BC-JAVA: from 1.59 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules). This vulnerability is associated with program files G3413CTRBlockCipher. This issue affects BC-JAVA: from 1.59 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
The product uses a broken or risky cryptographic algorithm or protocol.
An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules). This vulnerability is associated with program files G3413CTRBlockCipher. This issue affects BC-JAVA: from 1.59 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
The product uses a broken or risky cryptographic algorithm or protocol.
An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
CWE-327: Use of a Broken or Risky Cryptographic Algorithm. The product uses a broken or risky cryptographic algorithm or protocol.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/RE:M/U:RedCommon Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.
Operational remediation based on structured source evidence.
Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.
Published 15 Apr 2026 · Last source change 18 Sept 2026, 12:04 UTC · CWE-327 · Use of a Broken or Risky Cryptographic Algorithm
Core structured fields are present and their contributing authorities are shown above.