CVE-2026-78183
DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float
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.
INFO
Published Date :
Aug. 23, 2026, 8:16 p.m.
Last Modified :
Aug. 23, 2026, 8:16 p.m.
Remotely Exploit :
No
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
Affected Products
The following products are affected by CVE-2026-78183
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update DBD::Pg to a version later than 3.21.0.
- Recompile and reinstall the updated DBD::Pg module.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-78183.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-78183 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-78183
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-78183 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-78183 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Aug. 23, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/bucardo/dbdpg', 'modules': ['DBD::Pg'], 'versions': [{'status': 'affected', 'version': '3.21.0', 'versionType': 'custom'}], 'packageURL': 'pkg:cpan/DBD-Pg', 'packageName': 'DBD-Pg', 'programFiles': ['quote.c'], 'collectionURL': 'https://cpan.org/modules', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': 'quote_float'}]}] Added 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. Added CWE CWE-787 Added Reference https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch Added Reference https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e Added Reference https://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822 Added Reference https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes