TI-2026-83942 Aliases CVE-2026-120057 GHSA-5wgw-m382-jcv2

Buffer overflow in psqlODBC large-object read

LOW 34CWE-120Published 2026-11-02 · Updated 2026-11-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.

Summary

Versions before 18.00.0006 of psqlODBC copy the reply to a large-object read into the application's buffer using the length sent by the server, without checking the buffer size (CWE-120). A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process. Fetching any large-object column is enough to trigger it.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

psqlODBC copies the reply to a large-object read (loread) into the application's buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00244 15th percentileScored 2026-11-07

Fix Partial psqlODBC (PostgreSQL): 18.00.0006Red Hat: 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
PostgreSQL	psqlODBC	before 18.00.0006	18.00.0006	Patch available	CNA

psqlODBC VendorPostgreSQL Affected before 18.00.0006 Fixed in 18.00.0006 Patch available CNA

Remediation

psqlODBC 18.00.0006 fixes this flaw. Red Hat lists Red Hat Enterprise Linux 6, 7, 8, 9 and 10 as affected, with no fix available yet.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Fix · CNA psqlODBC (PostgreSQL) Fixed in 18.00.0006

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-11-02
PostgreSQL psqlODBC 18.00.0006
11 records Highest priority Priority LOW 11 LOW
Other records, highest priority first
- TI-2026-83949 Out-of-bounds access in psqlODBC via unchecked column and row numbersPriority LOW 35
- TI-2026-83947 SQL injection in psqlODBC SQLSpecialColumns table and schema namesPriority LOW 35
- TI-2026-83946 Stack buffer overflow in psqlODBC ODBC escape parserPriority LOW 35
Show all 11 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet
Red Hat Enterprise Linux 6	Affected	No fix yet
Red Hat Enterprise Linux 7	Affected	No fix yet
Red Hat Enterprise Linux 8	Affected	No fix yet
Red Hat Enterprise Linux 9	Affected	No fix yet

Timeline

2026-11-02 Threatist record created from CVE-2026-120057
2026-11-02 CISA SSVC decision points changed
2026-11-02 Priority changed: MEDIUM → LOW
2026-11-02 Alias added: GHSA-5wgw-m382-jcv2
2026-11-03 Affected versions changed · Red Hat
2026-11-03 CVSS score added · Red Hat

References

Advisory 1

https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r

TI-2024-01491 pgjdbc SQL Injection via line comment generation CVSS 3.1CRITICAL 10.0
TI-2019-06651 In PostgreSQL 9.3 through 11.2, the "COPY TO/FROM PROGRAM" function allows superusers and… CVSS 3.0HIGH 7.2
TI-2017-05187 Improper authentication in postgresql CVSS 3.0CRITICAL 9.8
TI-2022-06097 Unchecked Class Instantiation when providing Plugin Classes CVSS 3.1CRITICAL 9.8
TI-2022-13237 SQL Injection in ResultSet.refreshRow() with malicious column names in pgjdbc CVSS 3.1HIGH 8.0
TI-2020-15711 SQL injection in postgresql CVSS 3.1HIGH 8.8

See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences