Vulnerability · Published Aug 2, 2026 · Assigned by VulnCheck
CVE-2026-65321PyAthena SQL Injection via DefaultParameterFormatter DELETE/CTAS
Critical 9.8
In plain English
A critical-severity SQL injection in PyAthena from laughingman7743. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| laughingman7743 | PyAthena | 0 – through 3.35.3 |
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- Product Repository product
- GitHub Security Advisory (GHSA-xwj5-g6cv-4r5c) vendor-advisory
- Patch Commit patch
- https://www.vulncheck.com/advisories/pyathena-sql-injection-via-defaultparameterformatter-delete-ctas third-party-advisory
- https://rahulkarne.com/#/cve/CVE-2026-65321 technical-description
- https://github.com/rahulreddykarne/CVE-2026-65321-pyathena related