Legion of the Bouncy Castle Bouncy Castle for Java/Bouncy Castle for Java FIPS OpenPGP protection mechanism

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k2.49

Summaryinfo

A vulnerability has been found in Legion of the Bouncy Castle Bouncy Castle for Java and Bouncy Castle for Java FIPS and classified as critical. This affects an unknown function of the component OpenPGP. Performing a manipulation results in protection mechanism. This vulnerability is reported as CVE-2026-59643. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Legion of the Bouncy Castle Bouncy Castle for Java and Bouncy Castle for Java FIPS. This affects an unknown part of the component OpenPGP. The manipulation with an unknown input leads to a protection mechanism vulnerability. CWE is classifying the issue as CWE-693. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In Bouncy Castle for Java before 1.85, OpenPGP inline-signature policy failures silently ignored. This issue also affects Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 2.0.13.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-59643 since 07/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.85 or bcpg-fips 2.0.13 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Protection mechanism
CWE: CWE-693
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Bouncy Castle for Java/Bouncy Castle for Java FIPS 1.85/bcpg-fips 2.0.13

Timelineinfo

07/06/2026 CVE reserved
08/03/2026 +28 days Advisory disclosed
08/03/2026 +0 days VulDB entry created
08/03/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-59643 (🔒)
GCVE (CVE): GCVE-0-2026-59643
GCVE (VulDB): GCVE-100-385437

Entryinfo

Created: 08/03/2026 03:32
Changes: 08/03/2026 03:32 (55)
Complete: 🔍
Cache ID: 216::103

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