GHSA-6MQ2-JF7V-PVJX

Vulnerability from github – Published: 2026-08-23 21:31 – Updated: 2026-08-25 21:31
VLAI
Details

DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float.

quote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL. But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL.

This can be reached by the $dbh->quote method, for example

$dbh->quote( "Infinity", DBI::SQL_NUMERIC ).

This regression was introduced in 3.21.0 by the quote.c rewrite.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-78183"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-23T20:16:50Z",
    "severity": "CRITICAL"
  },
  "details": "DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float.\n\nquote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL.  But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL.\n\nThis can be reached by the $dbh-\u003equote method, for example\n\n    $dbh-\u003equote( \"Infinity\", DBI::SQL_NUMERIC ).\n\nThis regression was introduced in 3.21.0 by the quote.c rewrite.",
  "id": "GHSA-6mq2-jf7v-pvjx",
  "modified": "2026-08-25T21:31:21Z",
  "published": "2026-08-23T21:31:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78183"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/23/5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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