Heap-based Buffer Overflow in Babelfish for PostgreSQL TDS Prelogin Parser
Summary
| CVE | CVE-2026-119923 |
|---|---|
| State | PUBLISHED |
| Assigner | AMZN |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-06 19:17:39 UTC |
| Updated | 2026-11-07 22:16:34 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 9.3 CRITICAL from ff89ba41-3aa1-4d27-914a-91399e9639e5
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.006210000 probability, percentile 0.500760000 (date 2026-11-09)
Problem Types: CWE-122 | CWE-122 CWE-122 Heap-based buffer overflow
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | ff89ba41-3aa1-4d27-914a-91399e9639e5 | Secondary | 9.3 | CRITICAL | 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/E:X/C... |
| 4.0 | CNA | CVSS | 9.3 | CRITICAL | 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 |
| 3.1 | ff89ba41-3aa1-4d27-914a-91399e9639e5 | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
HighIntegrity
HighAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | AWS | Babelfish-for-postgresql | affected 1.0 1.5 custom | Not specified |
| CNA | AWS | Babelfish-for-postgresql | affected 2.1 2.15 custom | Not specified |
| CNA | AWS | Babelfish-for-postgresql | affected 3.1 3.12 custom | Not specified |
| CNA | AWS | Babelfish-for-postgresql | affected 4.0 4.8 custom | Not specified |
| CNA | AWS | Babelfish-for-postgresql | affected 5.1 5.4 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 1.0.0 1.5.5 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 1.6.0 1.17.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 2.0.0 2.3.5 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 2.4.0 2.12.4 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 2.13.0 2.13.3 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 2.14.0 2.14.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 2.15.0 2.15.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 2.16.0 2.16.1 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 3.0.0 3.8.4 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 3.9.0 3.9.4 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 3.10.0 3.10.3 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 3.11.0 3.11.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 3.12.0 3.12.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 3.13.0 3.13.1 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 4.0.0 4.5.5 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 4.6.0 4.6.3 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 4.7.0 4.7.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 4.8.0 4.8.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 4.9.0 4.9.1 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 5.0.0 5.1.4 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 5.2.0 5.2.3 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 5.3.0 5.3.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 5.4.0 5.4.2 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 5.5.0 custom | Not specified |
| CNA | Amazon | Amazon Aurora PostgreSQL With Babelfish | affected 6.0.0 6.0.2 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| aws.amazon.com/security/security-bulletins/2026-166-aws | ff89ba41-3aa1-4d27-914a-91399e9639e5 | aws.amazon.com | |
| github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/ta... | ff89ba41-3aa1-4d27-914a-91399e9639e5 | github.com | |
| github.com/babelfish-for-postgresql/babelfish_extensions/security/adviso... | ff89ba41-3aa1-4d27-914a-91399e9639e5 | github.com | |
| github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/ta... | ff89ba41-3aa1-4d27-914a-91399e9639e5 | github.com | |
| github.com/babelfish-for-postgresql/babelfish-for-postgresql/releases/ta... | ff89ba41-3aa1-4d27-914a-91399e9639e5 | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.