Legion of the Bouncy Castle BC-JAVA/BC-LTS-JAVA/BC-FJA up to 2.1.2 BCFKS Keystore load resource consumption

Summaryinfo

A vulnerability was 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. It has been classified as problematic. Impacted is the function Load of the component BCFKS Keystore. Performing a manipulation results in resource consumption. This vulnerability is reported as CVE-2026-58063. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was 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. It has been classified as problematic. This affects the function load of the component BCFKS Keystore. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

In Bouncy Castle for Java before 1.85, BCFKS keystore load honours unbounded KDF cost from untrusted file. 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).

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-58063 since 06/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion