Medium: bouncycastle

Issue Overview: In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle for Java LTS before 2.73.12. CVE-2026-12185 In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce...

Amazon Linux 2023 : bouncycastle, bouncycastle-javadoc, bouncycastle-mail (ALAS2023-2026-3405)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3405 advisory. In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle for Java LTS before 2.73.12...

org.bouncycastle/bcprov-jdk15on: Bouncy Castle for Java: Message Authentication Code (MAC) forgery due to a length-dependent Key Derivation Function (KDF) split

A flaw was found in Bouncy Castle for Java. This vulnerability allows for Message Authentication Code MAC forgery in the IESEngine stream-mode. The issue arises from a length-dependent Key Derivation Function KDF split, which an attacker could exploit to bypass integrity checks. This could lead t...

Improper Validation of Integrity Check Value

Overview Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value in the stream-mode IesEngine processing path in crypto/src/crypto/engines/IesEngine.cs. An attacker can forge shorter ciphertexts that the recipient accepts as authentic by observing one...

Information Exposure

Overview Affected versions of this package are vulnerable to Information Exposure through IesEngine.DecryptBlock in crypto/src/crypto/engines/IesEngine.cs. An attacker can recover plaintext from captured IES or ECIES ciphertexts by submitting modified ciphertexts for decryption under the same key...

CVE-2026-16001

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

CVE-2026-63567 IesEngine block-cipher mode checks padding before MAC (CBC padding oracle)

Observable discrepancy in IesEngine.DecryptBlock in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has captured an IES or ECIES ciphertext, and who can submit modified ciphertexts for decryption under the same key pair, to recover its plaintext via a CBC...

CVE-2026-63567 IesEngine block-cipher mode checks padding before MAC (CBC padding oracle)

Observable discrepancy in IesEngine.DecryptBlock in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has captured an IES or ECIES ciphertext, and who can submit modified ciphertexts for decryption under the same key pair, to recover its plaintext via a CBC...

CVE-2026-63567 IesEngine block-cipher mode checks padding before MAC (CBC padding oracle)

Observable discrepancy in IesEngine.DecryptBlock in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has captured an IES or ECIES ciphertext, and who can submit modified ciphertexts for decryption under the same key pair, to recover its plaintext via a CBC...

CVE-2026-16001 IesEngine stream-mode MAC forgery via length-dependent KDF split

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

CVE-2026-16001 IesEngine stream-mode MAC forgery via length-dependent KDF split

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

EUVD-2026-91206

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

CVE-2026-16001 IesEngine stream-mode MAC forgery via length-dependent KDF split

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

CVE-2026-16001

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

CVE-2026-16001

The Bouncy Castle Inc. bc-csharp library (versions before 2.7.0 ) is vulnerable to a message authentication key exposure in the IesEngine stream mode. Specifically, when an IesEngine is constructed without a block cipher, the MAC key is taken from the key derivation output immediately following a...

CVE-2026-16001: Improper Validation of Integrity Check Value

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

PT-2026-104102

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

Security Bulletin: TSSC/IMC addresses multiple security vulnerabilities in Bouncy Castle for Java

Summary TSSC/IMC addresses multiple security vulnerabilities, listed in the CVEs below. Vulnerability Details CVEID:CVE-2026-12185 DESCRIPTION: In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle f...

CVE-2026-12816

A flaw was found in Bouncy Castle for Java. This vulnerability allows for Message Authentication Code MAC forgery in the IESEngine stream-mode. The issue arises from a length-dependent Key Derivation Function KDF split, which an attacker could exploit to bypass integrity checks. This could lead t...

BASM (Broken Authentication & Session Management) Bouncy Castle Dependency in Jira Software Data Center and Server

This High severity BASM Broken Authentication & Session Management vulnerability known as CVE-2026-12816 was introduced in 9.12.1 and later of Jira Software Data Center and Server. This BASM Broken Authentication & Session Management vulnerability, with a CVSS Score of 8.7 and a CVSS Vector of...