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Advisory details: gitlab / maven/org.bouncycastle/bcpkix-fips/CVE-2026-59647
Advisory ID gitlab/maven/org.bouncycastle/bcpkix-fips/CVE-2026-59647
Aliases CVE-2026-59647
Summary CRMF/CMP password-MAC honours unbounded iteration count Affects Bouncy Castle for Java FIPS (BC-FJA) bcpkix-fips before 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series). PKMACBuilder's default constructor leaves the iteration ceiling disabled, so when a CA or RA verifies a password-MAC protected CMP or CRMF message the iteration count is taken from the attacker's PBMParameter and drives the digest loop unbounded. A count near 2^31 occupies a server thread for hours, and a small number of requests exhausts the thread pool. The same unbounded pattern applies to CMS PasswordRecipientInfo handling.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.bouncycastle/bcpkix-fips/CVE-2026-59647.yml
Reference id Reference type URL
c99d6427d6818d04165b07b45dfda96f2b384c53 Other https://github.com/bcgit/bc-java/commit/c99d6427d6818d04165b07b45dfda96f2b384c53
CVE-2026-59647 https://github.com/bcgit/bc-java/wiki/CVE-2026-59647
CVE-2026-59647 https://nvd.nist.gov/vuln/detail/CVE-2026-59647
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.bouncycastle/bcpkix-fips/CVE-2026-59647.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.