{"id":"CVE-2026-119923","published":"2026-11-06T19:17:39.360","lastModified":"2026-11-07T22:16:34.593","description":"A heap-based buffer overflow in the TDS prelogin parser in the Babelfish for PostgreSQL extension versions 1.0-1.5, 2.1-2.15, 3.1-3.12, 4.0-4.8, 5.1-5.4 and in Amazon Aurora PostgreSQL with Babelfish might allow remote attackers to execute arbitrary OS commands as the database process user via a specially crafted malformed TDS prelogin packet to the TDS port. This record consolidates a related NULL-pointer-dereference finding in the same prelogin parser.\n\n\n\nTo remediate this issue, we recommend users upgrade to Babelfish for PostgreSQL extension versions 4.10, 5.6, 6.1 or later. As a workaround, restrict network access to the TDS port (default 1433). Customers using Amazon Aurora PostgreSQL with Babelfish should upgrade their cluster to Aurora PostgreSQL 13.9.16 (1.5.5), 13.23.3 (1.17.2), 14.6.16 (2.3.5), 14.17.8 (2.12.4), 14.18.6 (2.13.3), 14.19.5 (2.14.2), 14.20.5 (2.15.2), 14.22.3 (2.16.1), 14.23.1 (2.17.0), 15.10.8 (3.8.4), 15.12.8 (3.9.4), 15.13.6 (3.10.3), 15.14.5 (3.11.2), 15.15.5 (3.12.2), 15.17.3 (3.13.1), 15.18.1 (3.14.0), 16.8.8 (4.5.5), 16.9.6 (4.6.3), 16.10.5 (4.7.2), 16.11.5 (4.8.2), 16.13.3 (4.9.1), 16.14.1 (4.10.0), 17.4.8 (5.1.4), 17.5.6 (5.2.3), 17.6.5 (5.3.2), 17.7.5 (5.4.2), 17.9.3 (5.5.1), 17.10.1 (5.6.0), 18.3.4 (6.0.2), 18.4.1 (6.1.0) or later, and apply any pending maintenance to ensure they are on the latest patch.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-122"],"vendors":[],"products":[],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-166-aws/","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_4_10_0__PG_16_14","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_5_6_0__PG_17_10","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_6_1_0__PG_18_4","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish_extensions/security/advisories/GHSA-vq28-vgj3-r26w","tags":[]}],"exploitRefs":[{"url":"https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_4_10_0__PG_16_14","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_5_6_0__PG_17_10","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_6_1_0__PG_18_4","tags":[]},{"url":"https://github.com/babelfish-for-postgresql/babelfish_extensions/security/advisories/GHSA-vq28-vgj3-r26w","tags":[]}],"hasPoc":true,"ai":{"summary":"A heap-based buffer overflow in the Babelfish TDS prelogin parser allows remote attackers to execute arbitrary OS commands as the database user by sending a malformed TDS prelogin packet to the TDS port (default 1433). This is critical due to the combination of remote exploitability, no authentication requirement, and full system compromise potential.","exploitability":"Exploitation is straightforward for remote attackers with network access to the TDS port; no authentication or user interaction is required.","blast_radius":"Successful exploitation grants full control over the database process, enabling data exfiltration, lateral movement, ransomware deployment, and complete compromise of the underlying host and connected systems.","remediation":"Upgrade Babelfish for PostgreSQL extension to version 4.10, 5.6, or 6.1 or later; for Amazon Aurora PostgreSQL with Babelfish, upgrade to Aurora PostgreSQL 13.9.16 (1.5.5), 13.23.3 (1.17.2), 14.6.16 (2.3.5), 14.17.8 (2.12.4), 14.18.6 (2.13.3), 14.19.5 (2.14.2), 14.20.5 (2.15.2), 14.22.3 (2.16.1), 14.23.1 (2.17.0), 15.10.8 (3.8.4), 15.12.8 (3.9.4), 15.13.6 (3.10.3), 15.14.5 (3.11.2), 15.15.5 (3.12.2), 15.17.3 (3.13.1), 15.18.1 (3.14.0), 16.8.8 (4.5.5), 16.9.6 (4.6.3), 16.10.5 (4.7.2), 16.11.5 (4.8.2), 16.13.3 (4.9.1), 16.14.1 (4.10.0), 17.4.8 (5.1.4), 17.5.6 (5.2.3), 17.6.5 (5.3.2), 17.7.5 (5.4.2), 17.9.3 (5.5.1), 17.10.1 (5.6.0), 18.3.4 (6.0.2), or 18.4.1 (6.1.0) or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["heap-overflow","tds","rce","babelfish","prelogin","null-pointer-dereference"],"model":"garnet-coder","analyzedAt":"2026-11-07T09:53:48.275Z"}}