CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2026-120149 PostgreSQL FDW batch-insert mismatch executes arbitrary code
High (8.8). EPSS 0.6% estimated probability of exploitation activity in the next 30 days.
On this page
Heap-based buffer overflow in PostgreSQL foreign batch inserts allows a foreign server to execute arbitrary code, via reporting that it inserted more rows than the server supplied. postgres_fdw can legitimately encounter this when a rule on the remote table expands an INSERT into additional rows. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.
Severity
- EPSS
- 0.6% estimated probability of exploitation activity in the next 30 days; 49th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-122 Heap-based Buffer Overflow
- Published
- Modified
- Assigned by
- PostgreSQL (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Fix and patched versions
- Debian, Red Hat, Alpine: fixed package versions per release
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12 | postgresql-15 | no fix listed | DEBIAN-CVE-2026-120149 |
| Debian | 13 | postgresql-17 | 17.12-0+deb13u1 | DEBIAN-CVE-2026-120149 |
| Debian | 14 | postgresql-18 | no fix listed | DEBIAN-CVE-2026-120149 |
| Ubuntu | 20.04:LTS | postgresql-12 | no fix listed | UBUNTU-CVE-2026-120149 |
| Ubuntu | 22.04:LTS | postgresql-14 | no fix listed | UBUNTU-CVE-2026-120149 |
| Ubuntu | 24.04:LTS | postgresql-16 | no fix listed | UBUNTU-CVE-2026-120149 |
| Ubuntu | 26.04:LTS, 26.10 | postgresql-18 | no fix listed | UBUNTU-CVE-2026-120149 |
| Ubuntu | Pro:14.04:LTS | postgresql-9.3 | no fix listed | UBUNTU-CVE-2026-120149 |
| Ubuntu | Pro:16.04:LTS | postgresql-9.5 | no fix listed | UBUNTU-CVE-2026-120149 |
| Ubuntu | Pro:18.04:LTS | postgresql-10 | no fix listed | UBUNTU-CVE-2026-120149 |
| Red Hat | hummingbird:1 | libpq, libpq-devel | 0:18.7-0.1.hum1 | RHSA-2026:99821 |
| Alpine | v3.21, v3.22 | postgresql15 | 15.20-r0 | ALPINE-CVE-2026-120149 |
| Alpine | v3.21, v3.22, v3.23 and 1 more | postgresql16 | 16.16-r0 | ALPINE-CVE-2026-120149 |
| Alpine | v3.21, v3.22, v3.23 and 1 more | postgresql17 | 17.12-r0 | ALPINE-CVE-2026-120149 |
| Alpine | v3.23, v3.24 | postgresql18 | 18.7-r0 | ALPINE-CVE-2026-120149 |
| Azure Linux | 3 | postgresql | no fix listed | AZL-113771 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Red Hat Security Data © Red Hat, Inc., CC BY 4.0; the Alpine secdb, CC BY-SA 4.0; Microsoft's Azure Linux vulnerability data, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu · Red Hat · Alpine.
Red Hat
Red Hat rates this Important.
This vulnerability is rated as Important severity because an attacker controlling an external data source could achieve remote code execution within the PostgreSQL server process by returning malformed row counts during batch write operations. Default deployments are not exposed unless administrators configure foreign data wrappers such as postgres_fdw to interact with remote endpoints. The impact is therefore constrained to setups interacting with untrusted foreign servers or remote schemas with expanding rewrite rules.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Hardened Images | libpq | Affected | |
| Red Hat Hardened Images | postgresql17 | Affected | |
| Red Hat Hardened Images | postgresql18 | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-120149.
Attack patterns (CAPEC)
- CAPEC-92 Forced Integer Overflow Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.