CVE record · CVE-2026-6637

PostgreSQL refint allows stack buffer overflow and SQL injection

CVSS 8.8 HighEPSS 0.0037 · 31st percentile

Published by the CVE Program (CNA: PostgreSQL) at 14 May 2026, 13:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	PostgreSQL	affected 18 to before 18.4 rpm affected 17 to before 17.10 rpm affected 16 to before 16.14 rpm affected 15 to before 15.18 rpm affected before 14.23 rpm Other versions: unaffected

Identifiers: CVE-2026-6637
CNA: PostgreSQL
Weakness (CWE): CWE-89 · CWE-121
Tags: PostgreSQL
SQL injection
Memory corruption
Published: 14 May 2026
Updated: 15 May 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (PostgreSQL)

CISA KEV Not listed.
EPSS 0.0037, the 31st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

www.postgresql.org/support/security/CVE-2026-6637/

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.