CVE-2026-65321

CRITICAL 9.8

PyAthena 3.35.4 SQL Injection via DefaultParameterFormatter DELETE/CTAS

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-89
Vendor	laughingman7743
Product	pyathena
Published	Aug 2, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

laughingman7743 / PyAthena

0 ≤ 3.35.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 Rahul Karne