CVE-2026-103603 Unbounded HSS public key level count allows huge array allocation during signature verification

Memory allocation with excessive size value in the HSS/LMS signature code HssPublicKeyParameters, HssSignature in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker who can supply both an HSS public key and a signature to cause a denial of service...

CVE-2026-103603

In Legion of the Bouncy Castle Inc. bc-csharp before version 2.7.0 , a memory allocation vulnerability exists in the HSS/LMS signature code (HssPublicKeyParameters , HssSignature ). An unauthenticated remote attacker can trigger a denial of service via memory exhaustion by providing an HSS public...

CVE-2026-103603 Unbounded HSS public key level count allows huge array allocation during signature verification

Memory allocation with excessive size value in the HSS/LMS signature code HssPublicKeyParameters, HssSignature in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker who can supply both an HSS public key and a signature to cause a denial of service...

CVE-2026-103600 Unbounded ASN.1 nesting depth causes process-terminating stack overflow

Uncontrolled recursion in the ASN.1 parser Asn1InputStream, Asn1StreamParser in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service via a crafted ASN.1 encoding of deeply nested constructed elements for example SEQUENCE...

EUVD-2026-91230

Uncontrolled recursion in the ASN.1 parser Asn1InputStream, Asn1StreamParser in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service via a crafted ASN.1 encoding of deeply nested constructed elements for example SEQUENCE...

CVE-2026-103600

The bc-csharp library by Legion of the Bouncy Castle Inc. (versions before 2.7.0 ) is vulnerable to a denial of service due to uncontrolled recursion in the ASN.1 parser (Asn1InputStream , Asn1StreamParser ). An unauthenticated remote attacker can provide a crafted ASN.1 encoding with deeply nest...

CVE-2026-103600 Unbounded ASN.1 nesting depth causes process-terminating stack overflow

Uncontrolled recursion in the ASN.1 parser Asn1InputStream, Asn1StreamParser in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service via a crafted ASN.1 encoding of deeply nested constructed elements for example SEQUENCE...

CVE-2026-103600 Unbounded ASN.1 nesting depth causes process-terminating stack overflow

Uncontrolled recursion in the ASN.1 parser Asn1InputStream, Asn1StreamParser in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service via a crafted ASN.1 encoding of deeply nested constructed elements for example SEQUENCE...

EUVD-2026-91229

Allocation of resources without limits in password-based private-key decryption PbeUtilities.GenerateCipherParameters in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply an encrypted private key, such as a PKCS8 EncryptedPrivateKeyInfo or "ENCRYPTED PRIVAT...

CVE-2026-63578 Unbounded PBE iteration count when decrypting PKCS#8 private keys

Allocation of resources without limits in password-based private-key decryption PbeUtilities.GenerateCipherParameters in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply an encrypted private key, such as a PKCS8 EncryptedPrivateKeyInfo or "ENCRYPTED PRIVAT...

CVE-2026-63578

The bc-csharp library (versions before 2.7.0 ) by Legion of the Bouncy Castle Inc. is vulnerable to a denial of service via CPU exhaustion in the PbeUtilities.GenerateCipherParameters function. This is caused by the allocation of resources without limits during password-based private-key decrypti...

CVE-2026-63578 Unbounded PBE iteration count when decrypting PKCS#8 private keys

Allocation of resources without limits in password-based private-key decryption PbeUtilities.GenerateCipherParameters in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply an encrypted private key, such as a PKCS8 EncryptedPrivateKeyInfo or "ENCRYPTED PRIVAT...

CVE-2026-63575 PKCS#12 key derivation loops about 2^32 times on a zero or negative iteration count

Loop with unreachable exit condition in the PKCS12 key derivation Pkcs12ParametersGenerator in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a PKCS12 PFX file, or a PKCS8 encrypted private key that uses a PKCS12 password-based encryption algorithm, to...

EUVD-2026-91226

Loop with unreachable exit condition in the PKCS12 key derivation Pkcs12ParametersGenerator in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a PKCS12 PFX file, or a PKCS8 encrypted private key that uses a PKCS12 password-based encryption algorithm, to...

CVE-2026-63575 PKCS#12 key derivation loops about 2^32 times on a zero or negative iteration count

Loop with unreachable exit condition in the PKCS12 key derivation Pkcs12ParametersGenerator in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a PKCS12 PFX file, or a PKCS8 encrypted private key that uses a PKCS12 password-based encryption algorithm, to...

CVE-2026-63575 PKCS#12 key derivation loops about 2^32 times on a zero or negative iteration count

Loop with unreachable exit condition in the PKCS12 key derivation Pkcs12ParametersGenerator in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a PKCS12 PFX file, or a PKCS8 encrypted private key that uses a PKCS12 password-based encryption algorithm, to...

CVE-2026-63575

The Bouncy Castle Inc. bc-csharp library (versions before 2.7.0 ) is vulnerable to a Denial of Service (DoS) attack due to a loop with an unreachable exit condition in the Pkcs12ParametersGenerator component. An attacker can provide a PKCS#12 (PFX) file or a PKCS#8 encrypted private key using a P...

CVE-2026-63574

The bc-csharp library (versions before 2.7.0 ) by Legion of the Bouncy Castle Inc. contains a memory allocation vulnerability in the OpenPGP signature and user attribute subpacket parsers (SignatureSubpacketsParser.ReadPacket , UserAttributeSubpacketsParser.ReadPacket ). A remote, unauthenticated...

CVE-2026-63574 Unbounded allocation from OpenPGP signature and user attribute subpacket lengths

Memory allocation with excessive size value in the OpenPGP signature and user attribute subpacket parsers SignatureSubpacketsParser.ReadPacket, UserAttributeSubpacketsParser.ReadPacket in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote, unauthenticated attacker who can...

CVE-2026-63574 Unbounded allocation from OpenPGP signature and user attribute subpacket lengths

Memory allocation with excessive size value in the OpenPGP signature and user attribute subpacket parsers SignatureSubpacketsParser.ReadPacket, UserAttributeSubpacketsParser.ReadPacket in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote, unauthenticated attacker who can...