CVE-2026-65321

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.

References

• https://github.com/laughingman7743/PyAthena
• https://github.com/laughingman7743/PyAthena/security/advisories/GHSA-xwj5-g6cv-4r5c
• https://github.com/pyathena-dev/PyAthena/commit/27901d12245ea722b3b4e211c60e2ade4e7c8efd
• https://www.vulncheck.com/advisories/pyathena-sql-injection-via-defaultparameterformatter-delete-ctas