CVE-2026-78183
DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float
- State
- Published
- Severity
- 9.8 Critical
- Published
- Aug 23, 2026
- Updated
- Aug 25, 2026
- Reserved
- Aug 23, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
DBD-Pg |
|
References
- https://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822vendor-advisory
- https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changesrelease-notes
- https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patchpatch
- https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227erelated
- http://www.openwall.com/lists/oss-security/2026/08/23/5
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