CVE-2026-59639

HighCVSS 7.5/10Last modified Aug 28, 2026

Description

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).

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-347

Affected software

VendorProductVersions
Legion of the Bouncy Castle Inc.BC-JAVA< 1.85
Legion of the Bouncy Castle Inc.BC-LTS-JAVA>= 2.73.0, < 2.73.12
Legion of the Bouncy Castle Inc.BC-FJA>= 1.0.0, < 1.0.12; >= 2.0.0, < 2.0.12; >= 2.1.0, < 2.1.12

References

Timeline

Published
Aug 3, 2026
Last modified
Aug 28, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-59649.8EasyFlow .NET developed by Digiwin has a SQL Injection vulnerability, allowing unauthenticated remote attackers to inject arbitrary SQL commCVE-2026-596405.3In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. This issue also affects Bouncy CVE-2026-596415.3In Bouncy Castle for Java before 1.85, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects BounCVE-2026-596427.5In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects BouncyCVE-2026-596437.5In Bouncy Castle for Java before 1.85, OpenPGP inline-signature policy failures silently ignored. This issue also affects Bouncy Castle for CVE-2026-596447.5In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.CVE-2026-596457.5In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema. This issue also affecCVE-2026-596467.5In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. This issue also affects BouCVE-2026-596475.3In Bouncy Castle for Java before 1.85, CRMF/CMP password-MAC honours unbounded iteration count. This issue also affects Bouncy Castle for JaCVE-2026-596485.3In Bouncy Castle for Java before 1.85, OpenPGP Argon2 S2K honours attacker-chosen memory and passes. This issue also affects Bouncy Castle fCVE-2026-596497.5In Bouncy Castle for Java before 1.85, OpenPGP user-attribute subpacket length bounded only by JVM max memory. This issue also affects BouncCVE-2026-59659.8NewSoftOA developed by NewSoft has an OS Command Injection vulnerability, allowing unauthenticated local attackers to inject arbitrary OS co
CVE-2026-59639: High severity, CVSS 7.5 | Vulnix