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TI-2026-05676 Aliases CVE-2026-6476GHSA-9crw-q654-rwgr

PostgreSQL pg_createsubscriber allows SQL injection via subscription name

Priority LOW 33CWE-89Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
SQL injection
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-89.

Summary

SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to execute arbitrary SQL as a superuser. The attack takes effect when pg_createsubscriber next runs. Within major versions 17 and 18, minor versions before PostgreSQL 18.4 and 17.10 are affected. Versions before PostgreSQL 17 are unaffected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Fix Fixed PostgreSQL: 18.4, 17.10Red Hat: 5 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—PostgreSQL18 to before 18.4; 17 to before 17.1018.4, 17.10Patch availableCNA
  • PostgreSQL Vendor— Affected 18 to before 18.4; 17 to before 17.10 Fixed in 18.4, 17.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*17.0 to before 17.10; 18.0 to before 18.4VulnerablePostgreSQL
  • cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* Versions 17.0 to before 17.10; 18.0 to before 18.4 Vulnerable ·PostgreSQL

Remediation

  • Fix · CNA PostgreSQL Fixed in 18.4, 17.10

Red Hat 5 advisories

  • RHSA-2026:67848 Released 2026-09-16 · Red Hat rating Important
    postgresql:18 security update
    • Red Hat Enterprise Linux AppStream (v. 9) pg_repack-1.5.3-1.module+el9.8.0+23739+1c42644c.aarch64::postgresql:18, pg_repack-1.5.3-1.module+el9.8.0+23739+1c42644c.ppc64le::postgresql:18, pg_repack-1.5.3-1.module+el9.8.0+23739+1c42644c.s390x::postgresql:18 +47
  • RHSA-2026:67280 Released 2026-09-14 · Red Hat rating Important
    postgresql18 security update
    • Red Hat Enterprise Linux AppStream (v. 10) postgresql18-18.6-1.el10_2, postgresql18-contrib-18.6-1.el10_2, postgresql18-docs-18.6-1.el10_2 +10
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) postgresql18-test-rpm-macros-18.6-1.el10_2
  • RHSA-2026:27742 Released 2026-06-22 · Red Hat rating Important
    postgresql18 security update
    • Red Hat Enterprise Linux AppStream (v. 10) postgresql18-18.4-1.el10_2, postgresql18-contrib-18.4-1.el10_2, postgresql18-docs-18.4-1.el10_2 +10
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) postgresql18-test-rpm-macros-18.4-1.el10_2
Show 2 more Red Hat advisories
  • RHSA-2026:26204 Released 2026-06-16 · Red Hat rating Important
    postgresql:18 security update
    • Red Hat Enterprise Linux AppStream (v. 9) pg_repack-1.5.3-1.module+el9.8.0+23739+1c42644c.aarch64::postgresql:18, pg_repack-1.5.3-1.module+el9.8.0+23739+1c42644c.ppc64le::postgresql:18, pg_repack-1.5.3-1.module+el9.8.0+23739+1c42644c.s390x::postgresql:18 +47
  • RHSA-2026:22878 Released 2026-06-03 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images postgresql-18.4-0.1.hum1@aarch64, postgresql-18.4-0.1.hum1@x86_64, postgresql-contrib-18.4-0.1.hum1@aarch64 +26

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:27742, RHSA-2026:67280
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:26204, RHSA-2026:67848
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:27742, RHSA-2026:67280
Red Hat Hardened ImagesFixed RHSA-2026:22878
Not affected: 7 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images
  • Self-service automation portal 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6476
  2. 2026-10-03 Alias added: GHSA-9crw-q654-rwgr

References

Patch 1

  • TI-2019-06651 In PostgreSQL 9.3 through 11.2, the "COPY TO/FROM PROGRAM" function allows superusers and… CVSS 3.0HIGH 7.2
  • TI-2017-05187 Improper authentication in postgresql CVSS 3.0CRITICAL 9.8
  • TI-2020-15711 SQL injection in postgresql CVSS 3.1HIGH 8.8
  • TI-2013-01675 Argument injection vulnerability in PostgreSQL 9.2.x before 9.2.4, 9.1.x before 9.1.9… CVSS 2.0MEDIUM 6.5
  • TI-2007-03176 The Database Link library (dblink) in PostgreSQL 8.1 implements functions via CREATE… CVSS 2.0HIGH 9.0
  • TI-2022-01423 SQL injection in postgresql CVSS 3.1HIGH 8.8
See all 202 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences