TI-2026-67481 Aliases CVE-2026-97873 GHSA-78x9-mjv2-rr3v

Legacy PBES1 and PKCS#12 PBE iteration count honoured unbounded in the raw JCA provider

LOW 30CWE-770Published 2026-10-03 · Updated 2026-10-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Partial Red Hat: 16 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.

Summary

In Bouncy Castle for Java before 1.86, the raw JCA provider's legacy PBES1 (PKCS#5 scheme 1) and PKCS#12 PBE families ran their password-based key derivation with an iteration count taken from untrusted input without bounding it, so a small input could dictate an arbitrary amount of work before anything could be verified. The AlgorithmParameters implementations (PKCS12PBE and its object identifier aliases, and PBKDF1) accepted any count from an encoded PKCS12PBEParams or PBEParameter, narrowing a value beyond the int range with intValue(), and every Cipher, Mac and SecretKeyFactory in these families derived with whatever count it was given, including one decoded by another provider's AlgorithmParameters, as when javax.crypto.EncryptedPrivateKeyInfo.getKeySpec() decrypts a PKCS#12 PBE-protected private key with BC. Both the parameter parse and the derivations now reject a negative or over-limit count under the org.bouncycastle.pbe.max_iteration_count property (default 10,000,000) that already bounded PBKDF2 (CVE-2026-17508), and the parse rejects a count beyond the int range rather than narrowing it. This issue also affects Bouncy Castle for Java LTS before 2.73.13.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00263 18th percentileScored 2026-11-07

Fix Partial BC-JAVA (Legion of the Bouncy Castle Inc.): 1.86BC-LTS-JAVA (Legion of the Bouncy Castle Inc.): 2.73.13Red Hat: 16 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

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	before 1.86	1.86	Patch available	CNA
Legion of the Bouncy Castle Inc.	BC-LTS-JAVA	2.73.0 to before 2.73.13	2.73.13	Patch available	CNA

BC-JAVA VendorLegion of the Bouncy Castle Inc. Affected before 1.86 Fixed in 1.86 Patch available CNA
BC-LTS-JAVA VendorLegion of the Bouncy Castle Inc. Affected 2.73.0 to before 2.73.13 Fixed in 2.73.13 Patch available CNA

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 1.86
Fix · CNA BC-LTS-JAVA (Legion of the Bouncy Castle Inc.) Fixed in 2.73.13

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-03
Legion of the Bouncy Castle BC-JAVA 1.86
11 records Highest priority Priority MEDIUM 4 MEDIUM, 7 LOW
Other records, highest priority first
- TI-2026-67477 MLS external commit can remove an arbitrary group memberPriority MEDIUM 43
- TI-2026-67476 PKIXCertPathReviewer does not apply X.509 name constraints to the target certificatePriority MEDIUM 43
- TI-2026-67475 CMS AuthenticatedData exposes attacker-inserted authAttrs when digestAlgorithm is absentPriority MEDIUM 42
Show all 11 records →
Release · 2026-10-03
Legion of the Bouncy Castle BC-LTS-JAVA 2.73.13
5 records Highest priority Priority MEDIUM 2 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2026-67476 PKIXCertPathReviewer does not apply X.509 name constraints to the target certificatePriority MEDIUM 43
- TI-2026-67475 CMS AuthenticatedData exposes attacker-inserted authAttrs when digestAlgorithm is absentPriority MEDIUM 42
- TI-2026-67480 OpenPGP message truncation not reported, bypassing the SEIPDv1 integrity checkPriority LOW 35
Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
OpenShift Developer Tools and Services	Affected	No fix yet: Fix deferred
Red Hat AMQ Broker 7	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform 2	Affected	No fix yet: Fix deferred
Red Hat Build of Keycloak	Affected	No fix yet: Fix deferred
Red Hat Fuse 7	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 7	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 8	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion Pack	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred
Red Hat OpenShift Dev Spaces	Affected	No fix yet: Fix deferred
Red Hat Satellite 6	Affected	No fix yet: Fix deferred
Red Hat Single Sign-On 7	Affected	No fix yet: Fix deferred
Red Hat build of Apache Camel 4 for Quarkus 3	Affected	No fix yet: Fix deferred
Red Hat build of Apache Camel for Spring Boot 4	Affected	No fix yet: Fix deferred
Red Hat build of Apicurio Registry 3	Affected	No fix yet: Fix deferred
Red Hat build of Quarkus	Affected	No fix yet: Fix deferred

Not affected: 3 products

OpenShift Developer Tools and Services
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-03 Threatist record created from CVE-2026-97873
2026-10-03 Alias added: GHSA-78x9-mjv2-rr3v
2026-10-05 CISA SSVC decision points changed
2026-10-15 Affected versions changed · Red Hat
2026-10-15 CVSS score added · Red Hat

References

Patch 1

https://github.com/bcgit/bc-java/commit/766a31026ac24ed3c6cad8662058ba450c338da1

Advisory 1

https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9097873

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

See all 109 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences