BREW-MAILCATCHER-CVE-202… (GHSA-28HH-PR2H-2W89)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:11 – Updated: 2026-09-17 17:44 – Source website
VLAI
Summary
sqlite3-ruby has Use-After-Free When Redefining SQLite Functions with Different Arity
Details

Summary

Using Database#create_function or Database#define_function to define the same function name more than once with different numbers of arguments ("arity") or text encodings will result in a invalid memory read and a segmentation fault.

Mitigation

Upgrade to sqlite3 gem v2.9.5 or later.

As a workaround, avoid defining multiple custom functions with the same name (varying numbers of arguments or encoding).

Severity

The sqlite3-ruby maintainers assess this as Low severity. It is reliably triggered after GC when code is structured in a particular way. There is no known general exploit that could be used as a denial of service attack.

Severity
2.0 (Low)
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "sqlite",
        "resource_purl": "pkg:gem/sqlite3@2.9.6",
        "upstream_fixed_in": "2.9.5"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "mailcatcher",
        "purl": "pkg:brew/mailcatcher"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.8.1"
            },
            {
              "fixed": "0.11.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "RubyGems",
        "key": "pkg:gem/sqlite3@2.9.6",
        "name": "sqlite3",
        "resource": "sqlite",
        "strategy": "registry",
        "subject_version": "2.9.6"
      }
    ]
  },
  "details": "## Summary\n\nUsing `Database#create_function` or `Database#define_function` to define the same function name more than once with different numbers of arguments (\"arity\") or text encodings will result in a invalid memory read and a segmentation fault.\n\n## Mitigation\n\nUpgrade to sqlite3 gem v2.9.5 or later.\n\nAs a workaround, avoid defining multiple custom functions with the same name (varying numbers of arguments or encoding).\n\n## Severity\n\nThe sqlite3-ruby maintainers assess this as Low severity. It is reliably triggered after GC when code is structured in a particular way. There is no known general exploit that could be used as a denial of service attack.",
  "id": "BREW-mailcatcher-CVE-2026-54619",
  "modified": "2026-09-17T17:44:12Z",
  "published": "2026-08-13T17:11:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/sqlite3-ruby/security/advisories/GHSA-28hh-pr2h-2w89"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/sqlite3-ruby/pull/710"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/sqlite3-ruby/commit/2bd436d17f77cdd4c31b00fe9d50b0d21cbaf033"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sqlite3/CVE-2026-54619.yml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sparklemotion/sqlite3-ruby"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/sqlite3-ruby/releases/tag/v2.9.5"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54619"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "sqlite3-ruby has Use-After-Free When Redefining SQLite Functions with Different Arity",
  "upstream": [
    "GHSA-28hh-pr2h-2w89",
    "CVE-2026-54619"
  ]
}



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