Vulnerability details
CVE-2026-119923
Heap-based Buffer Overflow in Babelfish for PostgreSQL TDS Prelogin Parser
Official 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. To 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (AMZN) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (AMZN) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| AWS | babelfish-for-postgresql | 1.0 ≤ v ≤ 1.5 | CVEProject cvelistV5 (CNA) |
| AWS | babelfish-for-postgresql | 2.1 ≤ v ≤ 2.15 | CVEProject cvelistV5 (CNA) |
| AWS | babelfish-for-postgresql | 3.1 ≤ v ≤ 3.12 | CVEProject cvelistV5 (CNA) |
| AWS | babelfish-for-postgresql | 4.0 ≤ v ≤ 4.8 | CVEProject cvelistV5 (CNA) |
| AWS | babelfish-for-postgresql | 5.1 ≤ v ≤ 5.4 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 5.5.0 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 1.0.0 ≤ v < 1.5.5 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 1.6.0 ≤ v < 1.17.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 2.0.0 ≤ v < 2.3.5 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 2.13.0 ≤ v < 2.13.3 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 2.14.0 ≤ v < 2.14.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 2.15.0 ≤ v < 2.15.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 2.16.0 ≤ v < 2.16.1 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 2.4.0 ≤ v < 2.12.4 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 3.0.0 ≤ v < 3.8.4 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 3.10.0 ≤ v < 3.10.3 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 3.11.0 ≤ v < 3.11.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 3.12.0 ≤ v < 3.12.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 3.13.0 ≤ v < 3.13.1 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 3.9.0 ≤ v < 3.9.4 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 4.0.0 ≤ v < 4.5.5 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 4.6.0 ≤ v < 4.6.3 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 4.7.0 ≤ v < 4.7.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 4.8.0 ≤ v < 4.8.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 4.9.0 ≤ v < 4.9.1 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 5.0.0 ≤ v < 5.1.4 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 5.2.0 ≤ v < 5.2.3 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 5.3.0 ≤ v < 5.3.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 5.4.0 ≤ v < 5.4.2 | CVEProject cvelistV5 (CNA) |
| Amazon | Amazon Aurora PostgreSQL with Babelfish | 6.0.0 ≤ v < 6.0.2 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_4_10_0__PG_16_14 release-notespatch
- https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_5_6_0__PG_17_10 release-notespatch
- https://github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/tag/BABEL_6_1_0__PG_18_4 release-notespatch
- https://aws.amazon.com/security/security-bulletins/2026-166-aws/ vendor-advisory
- https://github.com/babelfish-for-postgresql/babelfish_extensions/security/advisories/GHSA-vq28-vgj3-r26w third-party-advisory
Details
- Published
- 2026-11-06
- Last updated
- 2026-11-08
- State
- Published
- Assigner (CNA)
- AMZN
- Kolun priority
- 26 · Low
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-122Heap-based buffer overflow