PostgreSQL: Improper Validation of Specified Type of Input
CVE-2026-2004 is a high-severity improper validation of specified type of input vulnerability in PostgreSQL, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 18.2, 17.8, 16.12 as the first without the flaw, so updating PostgreSQL to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.32% chance of exploitation within 30 days, higher than 71% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update PostgreSQL to 18.2 or 17.8 or 16.12 or 15.16, whichever matches your release line, or a later version.
- Read the advisory on postgresql.org for workarounds and exact fixed builds.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CNA |
| CVSS 3.1 | 8.8 | High | CNA |
Official description
Missing validation of type of input in PostgreSQL intarray extension selectivity estimator function allows an object creator to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Validation of Specified Type of Input
The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
More Improper Validation of Specified Type of Input vulnerabilities (CWE-1287)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
- access.redhat.com/errata/RHSA-2026:19009
- access.redhat.com/errata/RHSA-2026:19010
- access.redhat.com/errata/RHSA-2026:3730
- access.redhat.com/errata/RHSA-2026:3887
- access.redhat.com/errata/RHSA-2026:3896
- access.redhat.com/errata/RHSA-2026:4024
- access.redhat.com/errata/RHSA-2026:4059
- access.redhat.com/errata/RHSA-2026:4063
- access.redhat.com/errata/RHSA-2026:4064
- access.redhat.com/errata/RHSA-2026:4074
- access.redhat.com/errata/RHSA-2026:4075
- access.redhat.com/errata/RHSA-2026:4110
- access.redhat.com/errata/RHSA-2026:4254
- access.redhat.com/errata/RHSA-2026:4441
- access.redhat.com/errata/RHSA-2026:4475
Other vulnerabilities in PostgreSQL
- 7.2 High severity
- 8.8 High severity
- 8.8 High severity
- 8.1 High severity
- 7.2 High severity
- 8.8 High severity
Recent Improper Validation of Specified Type of Input vulnerabilities
- 7.5 High severity
- 7.4 High severity
- 9.1 Critical severity
- 7.7 High severity
- 7.2 High severity
- 8.1 High severity
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