# CVE-2026-116317: PostgreSQL ts_rank_cd() heap buffer overflow may execute arbitrary code

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

Heap-based buffer overflow in PostgreSQL ts_rank_cd() may allow a database user to execute arbitrary code as the operating system user running the database, via an invalid tsvector containing duplicate positions.  Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- n/a / PostgreSQL: ≥ 18; < 18.7 (affected, rpm); ≥ 17; < 17.12 (affected, rpm); ≥ 16; < 16.16 (affected, rpm); ≥ 15; < 15.20 (affected, rpm); ≥ 0; < 14.25 (affected, rpm). Source: CNA: PostgreSQL

## Severity and prioritization

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: PostgreSQL

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-122

## Exploit evidence

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

## References

- https://www.postgresql.org/support/security/CVE-2026-116317/ (CNA: PostgreSQL)

## Provenance

- CNA: PostgreSQL: https://www.cve.org/CVERecord?id=CVE-2026-116317; retrieved 2026-11-12; source updated 2026-11-12

Revision: c00d88f362c8427fc1b73c84ecf5eefddbc1bdbd7b1cce4c32afa3050c2ebbe9

Canonical: https://y2.dev/cve/CVE-2026-116317

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