---
id: CVE-2026-65321
title: >-
  PyAthena prior to 3.35.4 contains a sql injection vulnerability that allows
  unauthenticated attackers to inject arbitrary SQL by exploiting improper
  quote-escaping in DefaultParameterFormatter.format(), which routes DELETE and
  CTAS state…
summary: >-
  PyAthena prior to 3.35.4 contains a sql injection vulnerability that allows
  unauthenticated attackers to inject arbitrary SQL by exploiting improper
  quote-escaping in DefaultParameterFormatter.format(), which routes DELETE and
  CTAS state…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-89
published: '2026-08-02'
updated: '2026-08-02'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65321'
references:
  - url: 'https://github.com/laughingman7743/PyAthena'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/laughingman7743/PyAthena/security/advisories/GHSA-xwj5-g6cv-4r5c
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pyathena-dev/PyAthena/commit/27901d12245ea722b3b4e211c60e2ade4e7c8efd
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pyathena-sql-injection-via-defaultparameterformatter-delete-ctas
    label: disclosure@vulncheck.com
tags:
  - nvd
  - exploit-available
ingestedAt: '2026-08-02T15:18:38.390Z'
epss: 0.00984
epssPercentile: 0.6031
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/rahulreddykarne/CVE-2026-65321-pyathena'
  checkedAt: '2026-09-21T15:30:08.288Z'
exploitAvailable: true
---

## Overview

PyAthena prior to 3.35.4 contains a sql injection vulnerability that allows unauthenticated attackers to inject arbitrary SQL by exploiting improper quote-escaping in DefaultParameterFormatter.format(), which routes DELETE and CTAS statements to the _escape_hive function that backslash-escapes single quotes rather than doubling them. Because Athena and Trino do not treat backslashes as escape characters inside string literals, attacker-supplied input such as a single quote followed by SQL syntax causes the parser to terminate the string literal prematurely, enabling data exfiltration via UNION SELECT, execution of destructive statements, and attacker-controlled CTAS destination and content.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.