GHSA-P93R-85WP-75V3

Vulnerability from github – Published: 2026-04-17 18:31 – Updated: 2026-04-25 23:25
VLAI
Summary
Bouncy Castle Has Covert Timing Channel Vulnerability
Details

Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.84.

Severity
8.9 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/S:P/AU:Y/U:Red
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.bouncycastle:bcprov-jdk15to18"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.71"
            },
            {
              "fixed": "1.84"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.bouncycastle:bcprov-jdk14"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.71"
            },
            {
              "fixed": "1.84"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.bouncycastle:bcprov-jdk18on"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.71"
            },
            {
              "fixed": "1.84"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-5598"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-385"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-25T23:25:24Z",
    "nvd_published_at": "2026-04-15T10:16:49Z",
    "severity": "HIGH"
  },
  "details": "Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.84.",
  "id": "GHSA-p93r-85wp-75v3",
  "modified": "2026-04-25T23:25:24Z",
  "published": "2026-04-17T18:31:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5598"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bcgit/bc-java"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bcgit/bc-java/wiki/CVE-2026-5598"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/S:P/AU:Y/U:Red",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Bouncy Castle Has Covert Timing Channel Vulnerability"
}


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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

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.