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CVE-2026-59639

CMS verifySignatures returns true for SignedData with zero signers PUBLISHED

Description (CNA)

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).

Affected (CNA)

Vendor / productVersions
Legion of the Bouncy Castle Inc. / BC-JAVAaffected 0 before 1.85
Legion of the Bouncy Castle Inc. / BC-LTS-JAVAaffected 2.73.0 before 2.73.12
Legion of the Bouncy Castle Inc. / BC-FJAaffected 1.0.0 before 1.0.12; affected 2.0.0 before 2.0.12; affected 2.1.0 before 2.1.12

CWE

CWE-347

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.