In Bouncy Castle for Java before 1.85, OpenPGP Argon2 S2K honours attacker-chosen memory and passes. (CVE-2026-59648)
Description
A vulnerability in Bouncy Castle for Java before version 1.85 allows the OpenPGP Argon2 S2K function to honor attacker-chosen memory and passes parameters. This issue also affects multiple Long-Term Support (LTS) and FIPS versions of Bouncy Castle for Java. The vulnerability has a moderate severity score and does not impact confidentiality or integrity but may affect availability.
CVSS v3.1
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59648 describes a vulnerability in Bouncy Castle for Java prior to version 1.85 where the OpenPGP Argon2 S2K implementation honors memory and passes values chosen by an attacker. This flaw also affects Bouncy Castle for Java LTS versions before 2.73.12 and Bouncy Castle for Java FIPS versions 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). The vulnerability is classified under CWE-770, indicating an allocation of resources without limits or throttling. The CVSS 3.1 base score is 5.3 (medium), with network attack vector, low attack complexity, no privileges or user interaction required, and no impact on confidentiality or integrity but some impact on availability.
Potential Impact
The vulnerability allows an attacker to specify memory and pass parameters in the Argon2 S2K function, potentially leading to resource exhaustion or denial of service conditions. There is no direct impact on confidentiality or integrity of data. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patches or fixes are listed in the provided data. Users should monitor vendor communications for updates and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-p3f8-5jpx-fgqm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-59648"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a92f816acd9273b49e90ebf
Added to database: 08/29/2026, 15:17:42 UTC
Last enriched: 09/09/2026, 18:38:29 UTC
Last updated: 10/13/2026, 18:48:21 UTC
Views: 65
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