Answer in brief
CVE-2026-5598 records a High severity (CVSS 7.5) vulnerability in Non-constant time comparisons risk private key leakage in FrodoKEM.. The current sources do not mark it as known exploited. The current feed maps Legion of the Bouncy Castle Inc./BC-JAVA (generic), org.bouncycastle:bcprov-jdk14 (maven), org.bouncycastle:bcprov-jdk15to18 (maven), org.bouncycastle:bcprov-jdk18on (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-5598 records a High severity (CVSS 7.5) vulnerability in Non-constant time comparisons risk private key leakage in FrodoKEM.. The current sources do not mark it as known exploited. The current feed maps Legion of the Bouncy Castle Inc./BC-JAVA (generic), org.bouncycastle:bcprov-jdk14 (maven), org.bouncycastle:bcprov-jdk15to18 (maven), org.bouncycastle:bcprov-jdk18on (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Legion of the Bouncy Castle Inc./BC-JAVA (generic), org.bouncycastle:bcprov-jdk14 (maven), org.bouncycastle:bcprov-jdk15to18 (maven), org.bouncycastle:bcprov-jdk18on (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Legion of the Bouncy Castle Inc./BC-JAVAgeneric | >=1.71 <1.80.2 || >=1.81 <1.81.1 || >=1.82 <1.84 | 1.80.2, 1.81.1, 1.84 |
| org.bouncycastle:bcprov-jdk14maven | >=1.81,<1.81.1 | 1.81.1 |
| org.bouncycastle:bcprov-jdk15to18maven | >=1.71,<1.80.2 | 1.80.2 |
| org.bouncycastle:bcprov-jdk18onmaven | >=1.82,<1.84 | 1.84 |
Published upstream
Apr 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Legion of the Bouncy Castle Inc./BC-JAVA (generic), org.bouncycastle:bcprov-jdk14 (maven), org.bouncycastle:bcprov-jdk15to18 (maven), org.bouncycastle:bcprov-jdk18on (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Legion of the Bouncy Castle Inc./BC-JAVAgeneric | >=1.71 <1.80.2 || >=1.81 <1.81.1 || >=1.82 <1.84 | 1.80.2, 1.81.1, 1.84 |
| org.bouncycastle:bcprov-jdk14maven | >=1.81,<1.81.1 | 1.81.1 |
| org.bouncycastle:bcprov-jdk15to18maven | >=1.71,<1.80.2 | 1.80.2 |
| org.bouncycastle:bcprov-jdk18onmaven | >=1.82,<1.84 | 1.84 |
Published upstream
Apr 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
Quoted source text, attributed separately from HOL analysis.