In Bouncy Castle for Java before 1.85, OpenPGP user-attribute subpacket length bounded only by JVM max memory. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (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 None

Vulnerable System Availability Impact High

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.

The EPSS score is 0.00263.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Legion of the Bouncy Castle Inc. BC-JAVA unaffected
Version Status Constraints
0 affected < 1.85
Legion of the Bouncy Castle Inc. BC-LTS-JAVA unaffected
Version Status Constraints
2.73.0 affected < 2.73.12
Legion of the Bouncy Castle Inc. BC-FJA unaffected
Version Status Constraints
1.0.0 affected < 1.0.13
2.0.0 affected < 2.0.13
2.1.0 affected < 2.1.13

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/bcgit/bc-java/commit/a43c40dc12c3e1c6cbd03c83fe30aaec4029b824 cve-icon
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059649 cve-icon
History

Mon, 03 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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

Type Values Removed Values Added
References

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

Type Values Removed Values Added
Description In Bouncy Castle for Java before 1.85, OpenPGP user-attribute subpacket length bounded only by JVM max memory. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).
Title OpenPGP user-attribute subpacket length bounded only by JVM max memory
Weaknesses CWE-789
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: bcorg

Published:

Updated: 2026-08-03T13:33:33.251Z

Reserved: 2026-07-06T07:09:01.524Z

Link: CVE-2026-59649

cve-icon Vulnrichment

Updated: 2026-08-03T13:33:29.553Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T09:15:03Z

Weaknesses