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Bouncy Castle Java EUVDEUVD-2026-52026

| CVE-2026-59648 MEDIUM
Allocation of Resources Without Limits or Throttling (CWE-770)
2026-08-03 bcorg GHSA-p3f8-5jpx-fgqm
Java Denial Of Service Bc Java Bc Lts Java Bc Fja
6.9
CVSS 4.0 · Vendor: bcorg
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Severity by source

Vendor (bcorg) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
7.5 HIGH

Network vector with no auth or interaction; A:H because attacker-controlled 1 TiB allocation crashes any typical JVM, contradicting the vendor's VA:L rating.

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

Primary rating from Vendor (bcorg).

CVSS VectorVendor: bcorg

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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 - 01:39 vuln.today
Analysis Generated
Aug 03, 2026 - 01:39 vuln.today
CVE Published
Aug 03, 2026 - 00:45 cve.org
MEDIUM 6.9

DescriptionCVE.org

In Bouncy Castle for Java before 1.85, OpenPGP Argon2 S2K honours attacker-chosen memory and passes. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).

AnalysisAI

Heap and CPU exhaustion in Bouncy Castle for Java's OpenPGP implementation allows remote unauthenticated attackers to cause denial of service by crafting OpenPGP messages with extreme Argon2 S2K cost parameters. The library honoured attacker-controlled memory, passes (iterations), and parallelism fields embedded in unauthenticated OpenPGP packets before any message authentication could occur, meaning a single crafted packet could instruct the JVM to allocate up to 2^30 KiB (approximately 1 TiB) of heap. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation The target application must use Bouncy Castle for Java to process OpenPGP passphrase-based encrypted (symmetric) messages - specifically, it must invoke PBEDataDecryptorFactory or equivalent Bouncy Castle PGP decryption APIs against attacker-supplied ciphertext. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector provided (AV:N/AC:L/AT:N/PR:N/UI:N/VA:L) scores 6.9, but the VA:L rating appears to understate the realistic worst-case impact. … 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 bc-java 1.85 or later, bc-lts-java 2.73.12 or later, or bcpg-fips 1.0.13 (1.0.X), 2.0.13 (2.0.X), or 2.1.13 (2.1.X) as appropriate. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
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-2026-52026 vulnerability details – vuln.today
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