psqlODBC ODBC escape parser stack buffer overflow

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-120061
StatePUBLISHED
AssignerPostgreSQL
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-02 19:18:03 UTC
Updated2026-11-02 20:17:39 UTC
DescriptionThe psqlODBC parser for ODBC escape sequences in application SQL text writes the argument offsets of a {fn} escape into a fixed 16-entry stack array without a bound and does not initialize the array. An escape with too many arguments overflows the stack, and a reference to an unsupplied argument copies arbitrary bytes into the query. The copy of a {d}, {t}, {ts}, or {escape} body also writes one byte past a 128-byte stack buffer. An application that forwards untrusted SQL text to the driver exposes its process to memory corruption. Versions before psqlODBC 18.00.0006 are affected.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-121 | CWE-193 | CWE-457 | CWE-121 CWE-121 Stack-based Buffer Overflow | CWE-193 CWE-193 Off-by-one Error | CWE-457 CWE-457 Use of Uninitialized Variable

VersionSourceTypeScoreSeverityVector
3.1f86ef6dc-4d3a-42ad-8f28-e6d5547a5007Secondary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PostgreSQL PsqlODBC affected 18.00.0006 custom Not specified

References

ReferenceSourceLinkTags
github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-hfm6-... f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to psqlODBC 18.00.0006 or later. The argument offset array is initialized and bounded, and the escape body copy reserves room for the terminator.

Workarounds

CNA: Do not pass SQL text from untrusted sources to the driver, or reject text containing ODBC escape sequences ({fn ...}, {d ...}, {t ...}, {ts ...}, {escape ...}) before it reaches the driver.

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