Is CVE-2026-78183 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-78183 being exploited in the wild.

How severe is CVE-2026-78183?

Critical severity, with a CVSS score of 9.8, published 23 August 2026.

Is there a fix for CVE-2026-78183?

A patch was published on 2026-08-23. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-78183 attacked?

It is attacked over the network.

Am I affected by CVE-2026-78183?

Check whether you run CPAN DBD::Pg at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-78183: DBD::Pg heap out-of-bounds write in quote_float

CVE-2026-78183 · Severity: critical · CVSS 9.8 · Published 2026-08-23

DBD::Pg is a database interface module for Perl that allows applications to connect to and query PostgreSQL databases. A memory allocation bug in the quote_float function causes a heap buffer overflow when quoting special floating-point literals (NaN, Infinity, etc.), which can be triggered by database queries. An attacker could exploit this to crash the application or potentially execute arbitrary code.

Vendors: CPAN.

Quick answers

Is CVE-2026-78183 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-78183 being exploited in the wild.
How severe is CVE-2026-78183?: Critical severity, with a CVSS score of 9.8, published 23 August 2026.
Which products and versions are affected?: CPAN DBD::Pg 3.21.0.
Is there a fix for CVE-2026-78183?: A patch was published on 2026-08-23. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-78183 attacked?: It is attacked over the network.
Am I affected by CVE-2026-78183?: Check whether you run CPAN DBD::Pg at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a heap out-of-bounds write in the quote_float() function in DBD::Pg 3.21.0, introduced during a rewrite of quote.c. The function allocates insufficient memory (length + 1 bytes) to store quoted special float literals (NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity), which require length + 3 bytes (opening quote, string content, closing quote, and NULL terminator). Every recognized literal overflows by 2 bytes, writing past the allocated buffer. The vulnerability can be triggered via the $dbh->quote() method with a SQL_NUMERIC type specifier, requiring no special privileges but direct application access to the vulnerable code path. The patch (commit 6d6f47ed) corrects the allocation size in quote.c line 375 from length + 1 to length + 3.

Affected products

CPAN DBD::Pg 3.21.0

Timeline

2026-08-23: disclosed
2026-08-23: patched

References

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