Legion of the Bouncy Castle BC-JAVA/BC-LTS-JAVA/BC-FJA up to 2.1.2 missing encryption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.0	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Legion of the Bouncy Castle BC-JAVA, BC-LTS-JAVA and BC-FJA up to 1.84/2.73.11/1.0.2.6/2.0.1/2.1.2 and classified as problematic. This vulnerability affects unknown code. This manipulation causes missing encryption. This vulnerability is registered as CVE-2026-58061. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Legion of the Bouncy Castle BC-JAVA, BC-LTS-JAVA and BC-FJA up to 1.84/2.73.11/1.0.2.6/2.0.1/2.1.2 and classified as problematic. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a missing encryption vulnerability. The CWE definition for the vulnerability is CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. As an impact it is known to affect confidentiality. The summary by CVE is:

In Bouncy Castle for Java before 1.85, CCM-family modes write plaintext to caller buffer before tag check. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

The advisory is shared at github.com. This vulnerability is known as CVE-2026-58061 since 06/28/2026. The exploitation appears to be difficult. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 331799 (Linux Distros Unpatched Vulnerability : CVE-2026-58061), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.85, 2.73.12, 1.0.2.7, 2.0.2 or 2.1.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (331799) and CERT Bund (WID-SEC-2026-2622). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Open Source Bouncy Castle

Productinfo

Type

• Programming Language Software

Vendor

• Legion of the Bouncy Castle

Name

• BC-FJA
• BC-JAVA
• BC-LTS-JAVA

Version

• 1.0
• 1.0.2.0
• 1.0.2.1
• 1.0.2.2
• 1.0.2.3
• 1.0.2.4
• 1.0.2.5
• 1.0.2.6
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44
• 1.45
• 1.46
• 1.47
• 1.48
• 1.49
• 1.50
• 1.51
• 1.52
• 1.53
• 1.54
• 1.55
• 1.56
• 1.57
• 1.58
• 1.59
• 1.60
• 1.61
• 1.62
• 1.63
• 1.64
• 1.65
• 1.66
• 1.67
• 1.68
• 1.69
• 1.70
• 1.71
• 1.72
• 1.73
• 1.74
• 1.75
• 1.76
• 1.77
• 1.78
• 1.79
• 1.80
• 1.81
• 1.82
• 1.83
• 1.84
• 2.0.0
• 2.0.1
• 2.1.0
• 2.1.1
• 2.1.2
• 2.73.0
• 2.73.1
• 2.73.2
• 2.73.3
• 2.73.4
• 2.73.5
• 2.73.6
• 2.73.7
• 2.73.8
• 2.73.9
• 2.73.10
• 2.73.11

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing encryption
CWE: CWE-311 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 331799
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-58061

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: BC-JAVA/BC-LTS-JAVA/BC-FJA 1.85/2.73.12/1.0.2.7/2.0.2/2.1.3

Timelineinfo

06/28/2026 CVE reserved
08/03/2026 +36 days Advisory disclosed
08/03/2026 +0 days VulDB entry created
08/04/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-58061 (🔒)
GCVE (CVE): GCVE-0-2026-58061
GCVE (VulDB): GCVE-100-385465
CERT Bund: WID-SEC-2026-2622 - Bouncy Castle: Mehrere Schwachstellen

Entryinfo

Created: 08/03/2026 05:22
Updated: 08/04/2026 07:58
Changes: 08/03/2026 05:22 (55), 08/04/2026 01:01 (7), 08/04/2026 07:58 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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