Non-constant time comparisons risk private key leakage in FrodoKEM.
Priority MEDIUM 48CWE-385Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Partial Red Hat: 7 fixed, 1 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00899 59th percentileScored 2026-11-07
Fix Partial BC-JAVA (Legion of the Bouncy Castle Inc.): 1.80.2, 1.81.1, 1.84org.bouncycastle:bcprov-jdk15to18 (Maven): 1.80.2+2 more productsRed Hat: 9 advisoriesRed Hat: 7 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA | 1.71 to before 1.80.2; 1.81 to before 1.81.1; 1.82 to before 1.84 | 1.80.2, 1.81.1, 1.84 | Patch available | CNA |
| — | org.bouncycastle:bcprov-jdk15to18 (Maven) | 1.71 to before 1.80.2 | 1.80.2 | Patch available | GHSA-p93r-85wp-75v3 |
| — | org.bouncycastle:bcprov-jdk14 (Maven) | 1.71 to before 1.84 | 1.84 | Patch available | GHSA-p93r-85wp-75v3 |
| — | org.bouncycastle:bcprov-jdk18on (Maven) | 1.82 to before 1.84 | 1.84 | Patch available | GHSA-p93r-85wp-75v3 |
| — | org.bouncycastle:bcprov-jdk18on (Maven) | 1.81 to before 1.84 | 1.84 | Patch available | GHSA-p93r-85wp-75v3 |
| — | org.bouncycastle:bcprov-jdk18on (Maven) | 1.71 to before 1.80.2 | 1.80.2 | Patch available | GHSA-p93r-85wp-75v3 |
- BC-JAVA VendorLegion of the Bouncy Castle Inc. Affected 1.71 to before 1.80.2; 1.81 to before 1.81.1; 1.82 to before 1.84 Fixed in 1.80.2, 1.81.1, 1.84 Patch available CNA
- org.bouncycastle:bcprov-jdk15to18 (Maven) Vendor— Affected 1.71 to before 1.80.2 Fixed in 1.80.2 Patch available GHSA-p93r-85wp-75v3
- org.bouncycastle:bcprov-jdk14 (Maven) Vendor— Affected 1.71 to before 1.84 Fixed in 1.84 Patch available GHSA-p93r-85wp-75v3
- org.bouncycastle:bcprov-jdk18on (Maven) Vendor— Affected 1.82 to before 1.84 Fixed in 1.84 Patch available GHSA-p93r-85wp-75v3
- org.bouncycastle:bcprov-jdk18on (Maven) Vendor— Affected 1.81 to before 1.84 Fixed in 1.84 Patch available GHSA-p93r-85wp-75v3
- org.bouncycastle:bcprov-jdk18on (Maven) Vendor— Affected 1.71 to before 1.80.2 Fixed in 1.80.2 Patch available GHSA-p93r-85wp-75v3
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:* | — | — | Legion of the Bouncy Castle Inc. |
- cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:* Versions — — ·Legion of the Bouncy Castle Inc.
Remediation
- Fix · CNA BC-JAVA (Legion of the Bouncy Castle Inc.) Fixed in 1.80.2, 1.81.1, 1.84
- Fix · GHSA-p93r-85wp-75v3 org.bouncycastle:bcprov-jdk15to18 (Maven) Fixed in 1.80.2 Advisory →
- Fix · GHSA-p93r-85wp-75v3 org.bouncycastle:bcprov-jdk14 (Maven) Fixed in 1.84 Advisory →
- Fix · GHSA-p93r-85wp-75v3 org.bouncycastle:bcprov-jdk18on (Maven) Fixed in 1.84 Advisory →
- Fix · GHSA-p93r-85wp-75v3 org.bouncycastle:bcprov-jdk18on (Maven) Fixed in 1.84 Advisory →
- Fix · GHSA-p93r-85wp-75v3 org.bouncycastle:bcprov-jdk18on (Maven) Fixed in 1.80.2 Advisory →
Red Hat 9 advisories
- RHSA-2026:53806 Released 2026-08-11 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 7.4.25 security update
- Red Hat JBoss Enterprise Application Platform 7.4.25
- RHSA-2026:53646 Released 2026-08-11 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 7.4.25 Security update
- Red Hat JBoss EAP 7.4 ELS for RHEL 9 eap7-activemq-artemis-2.16.0-22.redhat_00057.1.el9eap, eap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el9eap, eap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el9eap +47
- RHSA-2026:53645 Released 2026-08-11 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 7.4.25 Security update
- Red Hat JBoss EAP 7.4 ELS for RHEL 8 eap7-activemq-artemis-2.16.0-22.redhat_00057.1.el8eap, eap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el8eap, eap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el8eap +47
Show 6 more Red Hat advisories
- RHSA-2026:53644 Released 2026-08-11 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 7.4.25 security pdate
- Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server eap7-activemq-artemis-2.16.0-22.redhat_00057.1.el7eap, eap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el7eap, eap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el7eap +47
- RHSA-2026:18054 Released 2026-05-18 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.6 security update
- Red Hat JBoss EAP 8.1 for RHEL 8 eap8-activemq-artemis-2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-cli-2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-commons-2.40.0-6.redhat_00012.1.el8eap +47
- RHSA-2026:18055 Released 2026-05-18 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.6 security update
- Red Hat JBoss EAP 8.1 for RHEL 9 eap8-activemq-artemis-2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-cli-2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-commons-2.40.0-6.redhat_00012.1.el9eap +47
- RHSA-2026:18059 Released 2026-05-18 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.6 security update
- Red Hat JBoss Enterprise Application Platform 8.1.6.GA io.netty.netty-codec-http-4.1.132.Final-redhat-00001.jar, org.apache.activemq.artemis-server-2.40.0.redhat-00012.jar, org.bouncycastle.bcpkix-jdk18on-1.84.0.redhat-00001.jar +7
- RHSA-2026:12267 Released 2026-04-30 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 7.4.24 security update
- Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server eap7-bouncycastle-1.84.0-1.redhat_00001.1.el7eap, eap7-bouncycastle-mail-1.84.0-1.redhat_00001.1.el7eap, eap7-bouncycastle-pg-1.84.0-1.redhat_00001.1.el7eap +3
- Red Hat JBoss EAP 7.4 ELS for RHEL 8 eap7-bouncycastle-1.84.0-1.redhat_00001.1.el8eap, eap7-bouncycastle-mail-1.84.0-1.redhat_00001.1.el8eap, eap7-bouncycastle-pg-1.84.0-1.redhat_00001.1.el8eap +3
- Red Hat JBoss EAP 7.4 ELS for RHEL 9 eap7-bouncycastle-1.84.0-1.redhat_00001.1.el9eap, eap7-bouncycastle-mail-1.84.0-1.redhat_00001.1.el9eap, eap7-bouncycastle-pg-1.84.0-1.redhat_00001.1.el9eap +3
- RHSA-2026:12269 Released 2026-04-30 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 7.4.24 security update
- Red Hat JBoss Enterprise Application Platform 7.4.25 org.bouncycastle.bcprov-jdk18on-1.84.0.redhat-00001.jar
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Legion of the Bouncy Castle BC-JAVA 1.80.2, 1.81.1, 1.84
5 records Highest priority Priority MEDIUM 3 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2026-03020 Unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion.Priority MEDIUM 45
- TI-2025-13517 GOSTCTR implementation unable to process more than 255 blocks correctlyPriority MEDIUM 42
- TI-2026-04899 PKIX draft CompositeVerifier accepts empty signature sequence as valid.Priority LOW 35
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | No fix planned: Will not fix |
| Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server | Fixed | RHSA-2026:12267, RHSA-2026:53644 |
| Red Hat JBoss EAP 7.4 ELS for RHEL 8 | Fixed | RHSA-2026:12267 |
| Red Hat JBoss EAP 7.4 ELS for RHEL 9 | Fixed | RHSA-2026:12267 |
| Red Hat JBoss EAP 8.1 for RHEL 8 | Fixed | RHSA-2026:18054 |
| Red Hat JBoss EAP 8.1 for RHEL 9 | Fixed | RHSA-2026:18055 |
| Red Hat JBoss Enterprise Application Platform 7.4.25 | Fixed | RHSA-2026:12269, RHSA-2026:53806 |
| Red Hat JBoss Enterprise Application Platform 8.1.6.GA | Fixed | RHSA-2026:18059 |
Not affected: 29 products
- Cryostat 4
- OpenShift Developer Tools and Services
- Red Hat AMQ Broker 7
- Red Hat AMQ Clients
- Red Hat Build of Keycloak
- Red Hat Data Grid 8
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Fuse 7
- Red Hat JBoss EAP 8.1 for RHEL 8
- Red Hat JBoss EAP 8.1 for RHEL 9
- Red Hat JBoss Enterprise Application Platform 7
- Red Hat JBoss Enterprise Application Platform 7.4.25
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform 8.1.6.GA
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift Dev Spaces
- Red Hat Process Automation 7
- Red Hat Satellite 6
- Red Hat Single Sign-On 7
- Red Hat build of Apache Camel 4 for Quarkus 3
- Red Hat build of Apache Camel for Spring Boot 4
- Red Hat build of Apicurio Registry 3
- Red Hat build of Debezium 2
- Red Hat build of Debezium 3
- Red Hat build of Quarkus
- streams for Apache Kafka 2
- streams for Apache Kafka 3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-5598
- 2026-10-03 Alias added: GHSA-p93r-85wp-75v3
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-16 Fix available: Red Hat JBoss Enterprise Application Platform 8.1 · Red Hat
- 2026-10-20 Fix available: Red Hat JBoss Enterprise Application Platform 8.1.6.GA · Red Hat
- 2026-10-21 Affected versions changed · Red Hat
- 2026-11-01 Affected versions changed · Red Hat
- 2026-11-04 Fix available: Maven/org.bouncycastle:[email protected], Maven/org.bouncycastle:[email protected] · GHSA-p93r-85wp-75v3
- 2026-11-04 CVSS score changed · GHSA-p93r-85wp-75v3
- 2026-11-04 12 new references · GHSA-p93r-85wp-75v3
References
Patch 2
Advisory 2
Other 14
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json
- https://github.com/bcgit/bc-java/wiki/CVE-2026-5598
- https://github.com/bcgit/bc-java
- https://bugzilla.redhat.com/show_bug.cgi?id=2458635
- https://access.redhat.com/security/cve/CVE-2026-5598
- https://access.redhat.com/errata/RHSA-2026:53806
- https://access.redhat.com/errata/RHSA-2026:53646
- https://access.redhat.com/errata/RHSA-2026:53645
- https://access.redhat.com/errata/RHSA-2026:53644
- https://access.redhat.com/errata/RHSA-2026:18059
- https://access.redhat.com/errata/RHSA-2026:18055
- https://access.redhat.com/errata/RHSA-2026:18054
- https://access.redhat.com/errata/RHSA-2026:12269
- https://access.redhat.com/errata/RHSA-2026:12267
More Legion of the Bouncy Castle Inc. vulnerabilities
- TI-2018-15967 Legion of the Bouncy Castle Legion of the Bouncy Castle Java Cryptography APIs 1.58 up to… CVSS 3.1CRITICAL 9.8
- TI-2017-09736 BouncyCastle JCE TLS Bleichenbacher/ROBOT CVSS 3.0HIGH 7.5
- TI-2026-42545 MTI/A0 DH agreement exponentiates unvalidated peer value CVSS 4.0CRITICAL 9.3
- TI-2026-42533 JSSE hostname verifier CN-fallback enabled by default despite documented opt-in CVSS 4.0CRITICAL 9.3
- TI-2026-41816 Stapled OCSP response accepted without binding to the checked certificate CVSS 4.0CRITICAL 9.3
- TI-2026-07701 Name Constraints bypass via trailing dot in rfc822Name and URI CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-5598 · CVE Program
- CVE-2026-5598 · NVD
- FIRST EPSS
- GHSA-p93r-85wp-75v3 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-5598 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences