CVE-2026-59639

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. 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).

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59639.json",
    "cwe_ids": [
        "CWE-347"
    ],
    "cna_assigner": "bcorg",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "1.85"
                },
                {
                    "introduced": "1.0.0"
                },
                {
                    "fixed": "1.0.12"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.12"
                },
                {
                    "introduced": "2.1.0"
                },
                {
                    "fixed": "2.1.12"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/bcgit/bc-lts-java

Affected ranges

Type

GIT

Repo

https://github.com/bcgit/bc-lts-java

Events

Introduced

468b5082f3f0971e80bf9edb7029c17b39b9ba0c

Fixed

f101b232c5d3e07ecdd504210a57e43831d6cd65

Database specific

{
    "extracted_events": [
        {
            "introduced": "2.73.0"
        },
        {
            "fixed": "2.73.12"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

Other

r2rv73dot0

r2rv73dot1

r2rv73dot10

r2rv73dot11

r2rv73dot3

r2rv73dot4

r2rv73dot6

r2rv73dot8

r2rv73dot9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59639.json"