CVE-2026-13505 (GCVE-0-2026-13505)

Vulnerability from cvelistv5 – Published: 2026-08-08 00:59 – Updated: 2026-08-10 18:23
VLAI
Title
Zeroisation of sensitive key material on garbage collection relies on finalization
Summary
In 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), sensitive key material held by the AES and DESede engines, the SP 800-90A DRBGs, SymmetricSecretKey and the PBKD and scrypt parameter classes was zeroised on garbage collection by overriding Object.finalize. Finalization runs at an unspecified time and in an unspecified order and is serviced by a single finalizer thread, so where objects carrying a finalizer are allocated faster than that thread retires them the pending-finalization queue grows without bound: disposal falls arbitrarily far behind, which can contribute to an OutOfMemoryError under load, and the key material those objects hold stays resident in the heap for as long as they are queued, defeating the purpose of the zeroisation. The behaviour was not a problem on Java 8 or Java 11; it is later JVMs, on which finalization has been deprecated and progressively de-emphasised, where it becomes one. Disposal of these classes now runs from a java.lang.ref.Cleaner registered in the multi-release jdk1.9 overlay, so on Java 9 and later it no longer depends on the finalizer being scheduled. Bouncy Castle for Java (bcprov) and Bouncy Castle for Java LTS are not affected, as neither implements the finalizer-based zeroisation scheme.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 15:57 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
bcorg CNA under the mitre root
CNA scorecard B 84/100 over 74 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Legion of the Bouncy Castle Inc. BC-FJA Affected: 1.0.0 , < 1.0.2.7 (maven)
Affected: 2.0.0 , < 2.0.2 (maven)
Affected: 2.1.0 , < 2.1.3 (maven)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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            "orgId": "91579145-5d7b-4cc5-b925-a0262ff19630",
            "shortName": "bcorg"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9013505"
            }
          ],
          "source": {
            "discovery": "INTERNAL"
          },
          "title": "Zeroisation of sensitive key material on garbage collection relies on finalization",
          "x_generator": {
            "engine": "bc release-notes template"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630",
        "assignerShortName": "bcorg",
        "cveId": "CVE-2026-13505",
        "datePublished": "2026-08-08T00:59:40.512Z",
        "dateReserved": "2026-06-28T01:23:14.833Z",
        "dateUpdated": "2026-08-10T18:23:21.149Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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    Related by attack behaviour

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