# CVE-2026-116333: PostgreSQL parallel B-tree array scan reads beyond array bounds

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

Buffer over-read in PostgreSQL parallel B-tree scans allows an object creator to read attacker-chosen server-memory addresses, via a function incorrectly marked PARALLEL SAFE or STABLE to make participating workers build different scan-key arrays.  Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected.  Versions before PostgreSQL 17 are unaffected.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- n/a / PostgreSQL: ≥ 18; < 18.7 (affected, rpm); ≥ 17; < 17.12 (affected, rpm). Source: CNA: PostgreSQL

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: PostgreSQL

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-126

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.postgresql.org/support/security/CVE-2026-116333/ (CNA: PostgreSQL)

## Provenance

- CNA: PostgreSQL: https://www.cve.org/CVERecord?id=CVE-2026-116333; retrieved 2026-11-12; source updated 2026-11-12

Revision: 70e8f17932912e99f7a7e09f77b33b8e7a9f2949d393328737d25292bd17f190

Canonical: https://y2.dev/cve/CVE-2026-116333

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