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Bouncy Castle Java EUVDEUVD-2026-52090

| CVE-2026-58061 HIGH
Improper Validation of Integrity Check Value (CWE-354)
2026-08-03 bcorg GHSA-cwc6-73j8-3qm6
Java Information Disclosure Bc Java Bc Lts Java Bc Fja Suse
8.7
CVSS 4.0 · Vendor: bcorg
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Severity by source

Vendor (bcorg) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
vuln.today AI
6.5 MEDIUM

AC:H because oracle exploitation requires the caller application to expose the output buffer on the failure path; C:H for plaintext recovery via oracle; I:L for potential processing of unverified forged plaintext; A:N as no availability impact exists.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
SUSE
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from Vendor (bcorg).

CVSS VectorVendor: bcorg

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 03, 2026 - 03:04 vuln.today
Analysis Generated
Aug 03, 2026 - 03:04 vuln.today
CVE Published
Aug 03, 2026 - 02:36 cve.org
HIGH 8.7

DescriptionCVE.org

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).

AnalysisAI

CCMBlockCipher in Bouncy Castle for Java decrypts ciphertext directly into the caller-supplied output buffer before verifying the authentication tag, leaving unverified CTR-decrypted plaintext in memory when tag verification fails and violating NIST SP 800-38C §6.2. Every edition - bc-java before 1.85, bc-lts-java before 2.73.12, and BC-FJA across three active release lines (1.0.x, 2.0.x, 2.1.x) - is affected. …

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Attack ChainAIDerived

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Vulnerability AssessmentAI

Exploitation Exploitation requires both a library-level and an application-level condition to be satisfied simultaneously. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VI:H) is aggressive for a vulnerability whose most severe consequence - the CTR decryption oracle - requires the caller application to expose the output buffer on the authentication-failure path, a condition absent from the vector's AT:N rating. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to a confirmed fixed release: bc-java 1.85 or later, bc-lts-java 2.73.12 or later, BC-FJA 1.0.2.7 (1.0.x series), BC-FJA 2.0.2 (2.0.x series), or BC-FJA 2.1.3 (2.1.x series). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all systems and applications using bc-java, bc-lts-java, or BC-FJA and document their current versions. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected

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EUVD-2026-52090 vulnerability details – vuln.today
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