Bug 2510189 (CVE-2026-59645)

Summary: CVE-2026-59645 org.bouncycastle/bcprov-jdk15on: org.bouncycastle/bcutil-fips: Bouncy Castle for Java: Denial of Service via OER parser unbounded recursion
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: anujha, aschwart, asoldano, aszczucz, ataylor, bbaranow, bmaxwell, boliveir, bstansbe, dfreiber, dlofthou, drichtar, drow, ehugonne, gmalinko, istudens, ivassile, iweiss, janstey, jburrell, mosmerov, mposolda, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, pmackay, rhel-process-autobot, rmartinc, rstancel, rstepani, ssilvert, sthorger, thjenkin, vdosoudi, vkumar, vmuzikar, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Bouncy Castle for Java. A remote attacker could exploit this vulnerability by providing a specially crafted self-referential IEEE 1609.2 schema to the OER (Octet Encoding Rules) parser. This can cause the parser to recurse without a depth limit, leading to resource exhaustion and a denial of service (DoS) for the affected system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2523395, 2523396, 2523397    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-03 02:01:19 UTC
In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcutil-fips 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).