CVE-2026-59642 - Vulnerability Details - OpenCVE

In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

No data.

References

Link	Providers
https://github.com/bcgit/bc-java/commit/2117f316a5a47308f3e569695a6592b16aac0dd7
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059642

History

Mon, 03 Aug 2026 05:30:00 +0000

Type	Values Removed	Values Added
References	https://github.com/bcgit/bc-java/wiki/CVE-2026-59642	https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059642

Mon, 03 Aug 2026 01:15:00 +0000

Type	Values Removed	Values Added
Description		In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).
Title		CMS AuthenticatedData content not bound to MAC when authAttrs present
Weaknesses		CWE-354
References		https://github.com/bcgit/bc-java/commit/2117f316a5a47308f3e569695a6592b16aac0dd7 https://github.com/bcgit/bc-java/wiki/CVE-2026-59642
Metrics		cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber'}`

MITRE

Status: PUBLISHED

Assigner: bcorg

Published: 2026-08-03T00:53:28.335Z

Updated: 2026-08-03T05:03:43.251Z

Reserved: 2026-07-06T06:58:29.263Z

Link: CVE-2026-59642

Vulnrichment

No data.

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59642", "assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "state": "PUBLISHED", "assignerShortName": "bcorg", "dateReserved": "2026-07-06T06:58:29.263Z", "datePublished": "2026-08-03T00:53:28.335Z", "dateUpdated": "2026-08-03T05:03:43.251Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "shortName": "bcorg", "dateUpdated": "2026-08-03T05:03:43.251Z"}, "title": "CMS AuthenticatedData content not bound to MAC when authAttrs present", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-354", "description": "CWE-354 Improper Validation of Integrity Check Value", "type": "CWE"}]}], "affected": [{"vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-JAVA", "platforms": ["all"], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java/", "packageName": "bcpkix", "repo": "https://github.com/bcgit/bc-java", "packageURL": "pkg:maven/org.bouncycastle/bcpkix-jdk18on", "modules": ["pkix"], "programFiles": ["RecipientInformation"], "versions": [{"status": "affected", "version": "0", "lessThan": "1.85", "versionType": "maven"}], "defaultStatus": "unaffected"}, {"vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-LTS-JAVA", "platforms": ["all"], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-lts/", "packageName": "bcpkix-lts8on", "repo": "https://github.com/bcgit/bc-lts-java", "packageURL": "pkg:maven/org.bouncycastle/bcpkix-lts8on", "modules": ["pkix"], "programFiles": ["RecipientInformation"], "versions": [{"status": "affected", "version": "2.73.0", "lessThan": "2.73.12", "versionType": "maven"}], "defaultStatus": "unaffected"}, {"vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-FJA", "platforms": ["all"], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-fips/", "packageName": "bcpkix-fips", "packageURL": "pkg:maven/org.bouncycastle/bcpkix-fips", "versions": [{"status": "affected", "version": "1.0.0", "lessThan": "1.0.12", "versionType": "maven"}, {"status": "affected", "version": "2.0.0", "lessThan": "2.0.12", "versionType": "maven"}, {"status": "affected", "version": "2.1.0", "lessThan": "2.1.12", "versionType": "maven"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).</p>"}]}], "references": [{"url": "https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059642", "tags": ["vendor-advisory"]}, {"url": "https://github.com/bcgit/bc-java/commit/2117f316a5a47308f3e569695a6592b16aac0dd7", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "AMBER", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber"}}], "credits": [{"lang": "en", "value": "Alex Gaynor in collaboration with Claude and Anthropic Research", "type": "reporter"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "bc release-notes template"}}}}