# CVE-2026-78183

> As of 2026-08-23, CVE-2026-78183 is a vulnerability, EPSS 0.2% (13.5th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-78183 as of 2026-08-23; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-23

## What is CVE-2026-78183?

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.

The record classifies CVE-2026-78183 under weakness class [CWE-787](https://intel.threadlinqs.com/cwe/CWE-787). The identifier was first published 43 days ago.

## Severity and exploitation probability

- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 13.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 0.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-23

## Is CVE-2026-78183 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

## Affected products and versions

No affected-product or package list has been recorded for CVE-2026-78183 in the tracked sources. The vendor advisory and the references below are the authoritative statement of what is affected.

## How to fix CVE-2026-78183

No vendor patch reference has been recorded for CVE-2026-78183 in the tracked sources. Follow the references below for a fix, and treat any affected deployment as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-78183

No threat campaign in the Threadlinqs corpus currently references CVE-2026-78183, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-24. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822)
- [metacpan.org — release notes](https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes)
- [github.com — patch](https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch)

**Other references**

- [github.com — related](https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-78183
Full detection coverage and IOCs for threats exploiting CVE-2026-78183 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp