PostgreSQL missing validation of multibyte character length executes arbitrary code
Published Feb 12, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
PostgreSQL missing validation of multibyte character length executes arbitrary code
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices 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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- www.postgresql.org ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
- access.redhat.com ↗
Record history
Published Feb 12, 2026 · Last refreshed Nov 3, 2026