TI-2026-83943 Aliases CVE-2026-120058 GHSA-239q-q7g3-5876

Heap buffer overflow in psqlODBC row cache on later FETCH

LOW 34CWE-191Published 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-191 and the CVSS impact.

Summary

psqlODBC sizes its row cache from the column count of a cursor's first result, but does not check that later FETCH replies keep the same column count. A server not trusted under current SSL settings can answer a later FETCH with more columns, making the driver write tuple records past the end of a heap allocation (CWE-787). This is reachable with UseDeclareFetch enabled. Versions from 0 before 18.00.0006 are affected.

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

Description from the CNA

psqlODBC sizes its row cache from the column count of a cursor's first result, but recomputes the column count from each later FETCH reply without checking that it matches. A server not trusted under current SSL settings can answer a later FETCH with more columns and make the driver write tuple records past the end of the heap allocation. A keyset reply with fewer columns than the key fields also underflows the unsigned field count. This is reachable with UseDeclareFetch enabled. Versions before psqlODBC 18.00.0006 are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00255 17th 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

Update PostgreSQL psqlODBC to 18.00.0006. The sources list no fixed version for Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 or Red Hat Enterprise Linux 10.

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-2026-120058
2026-11-02 CISA SSVC decision points changed
2026-11-02 Priority changed: MEDIUM → LOW
2026-11-02 Alias added: GHSA-239q-q7g3-5876
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-6rmx-9q62-4w6m

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