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CVE-2026-6637
ANC
High

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system …

CVSS
8.8
High
EPSS
0.00
p13
Published
2026-01-01
Updated
2026-01-01
Description

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Tags · CWE
SQLi
CWE-89
CAPEC-7
CAPEC-66
CAPEC-108
CAPEC-109
CAPEC-110
CAPEC-470
Affected products
Postgresql < 14.23Postgresql 15.0–15.18Postgresql 16.0–16.14Postgresql 17.0–17.10Postgresql 18.0–18.4
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Timeline
2026-01-01
Published
2026-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: L
Low (L)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.000 · p13
Known exploited (KEV)
No
Known exploits — Сканер-ВС
No Сканер-ВС checks registered for this vulnerability yet.
Affected software
ProductVendorStatus
Tracked
postgresql-13Tracked
postgresql-15Tracked
postgresql-17Tracked
postgresql-18Tracked
postgresql*Tracked
Source databases
ANC
DEB
CVE
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