CVE-2026-119923 PUBLISHED

Heap-based Buffer Overflow in Babelfish for PostgreSQL TDS Prelogin Parser

Assigner: AMZN
Reserved: 30.10.2026 Published: 06.11.2026 Updated: 06.11.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 9.3

Product Status

Vendor AWS
Product babelfish-for-postgresql
Versions Default: unaffected
  • affected from 1.0 to 1.5 (incl.)
  • affected from 2.1 to 2.15 (incl.)
  • affected from 3.1 to 3.12 (incl.)
  • affected from 4.0 to 4.8 (incl.)
  • affected from 5.1 to 5.4 (incl.)
Vendor Amazon
Product Amazon Aurora PostgreSQL with Babelfish
Versions Default: unaffected
  • affected from 1.0.0 to 1.5.5 (excl.)
  • affected from 1.6.0 to 1.17.2 (excl.)
  • affected from 2.0.0 to 2.3.5 (excl.)
  • affected from 2.4.0 to 2.12.4 (excl.)
  • affected from 2.13.0 to 2.13.3 (excl.)
  • affected from 2.14.0 to 2.14.2 (excl.)
  • affected from 2.15.0 to 2.15.2 (excl.)
  • affected from 2.16.0 to 2.16.1 (excl.)
  • affected from 3.0.0 to 3.8.4 (excl.)
  • affected from 3.9.0 to 3.9.4 (excl.)
  • affected from 3.10.0 to 3.10.3 (excl.)
  • affected from 3.11.0 to 3.11.2 (excl.)
  • affected from 3.12.0 to 3.12.2 (excl.)
  • affected from 3.13.0 to 3.13.1 (excl.)
  • affected from 4.0.0 to 4.5.5 (excl.)
  • affected from 4.6.0 to 4.6.3 (excl.)
  • affected from 4.7.0 to 4.7.2 (excl.)
  • affected from 4.8.0 to 4.8.2 (excl.)
  • affected from 4.9.0 to 4.9.1 (excl.)
  • affected from 5.0.0 to 5.1.4 (excl.)
  • affected from 5.2.0 to 5.2.3 (excl.)
  • affected from 5.3.0 to 5.3.2 (excl.)
  • affected from 5.4.0 to 5.4.2 (excl.)
  • Version 5.5.0 is affected
  • affected from 6.0.0 to 6.0.2 (excl.)

References

Problem Types

  • CWE-122 Heap-based buffer overflow CWE

Impacts

  • CAPEC-100 Overflow Buffers