CVE-2026-65321

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.

CVSS 4.0

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-25)

CWE

CWE-89

Published

2026-08-02

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

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://github.com/rahulreddykarne/CVE-2026-65321-pyathena
• https://rahulkarne.com/#/cve/CVE-2026-65321

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