PostgreSQL up to 18.4 to_char heap-based overflow

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7.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in PostgreSQL up to 14.23/15.18/16.14/17.10/18.4. It has been declared as critical. Impacted is the function to_char. Executing a manipulation can lead to heap-based overflow. This vulnerability is handled as CVE-2026-14669. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in PostgreSQL up to 14.23/15.18/16.14/17.10/18.4 and classified as critical. This vulnerability affects the function to_char. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Heap buffer overflow in PostgreSQL to_char(timestamptz) allows the party choosing the timezone to execute arbitrary code as the operating system user running the database, via a long POSIX timezone abbreviation. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

The advisory is shared for download at postgresql.org. This vulnerability was named CVE-2026-14669 since 07/03/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 341035 (SUSE SLES12: postgresql16 / postgresql16-contrib / postgresql16-devel / etc (SUSE-SU-2026:3794-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 14.24, 15.19, 16.15, 17.11 or 18.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (341035) and CERT Bund (WID-SEC-2026-2844). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Open Source PostgreSQL

Productinfo

Type

• Database Software

Name

• PostgreSQL

Version

• 14.0
• 14.1
• 14.2
• 14.3
• 14.4
• 14.5
• 14.6
• 14.7
• 14.8
• 14.9
• 14.10
• 14.11
• 14.12
• 14.13
• 14.14
• 14.15
• 14.16
• 14.17
• 14.18
• 14.19
• 14.20
• 14.21
• 14.22
• 14.23
• 15.0
• 15.1
• 15.2
• 15.3
• 15.4
• 15.5
• 15.6
• 15.7
• 15.8
• 15.9
• 15.10
• 15.11
• 15.12
• 15.13
• 15.14
• 15.15
• 15.16
• 15.17
• 15.18
• 16.0
• 16.1
• 16.2
• 16.3
• 16.4
• 16.5
• 16.6
• 16.7
• 16.8
• 16.9
• 16.10
• 16.11
• 16.12
• 16.13
• 16.14
• 17.0
• 17.1
• 17.2
• 17.3
• 17.4
• 17.5
• 17.6
• 17.7
• 17.8
• 17.9
• 17.10
• 18.0
• 18.1
• 18.2
• 18.3
• 18.4

License

• open-source

Website

• Product: https://www.postgresql.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
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CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (PostgreSQL): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 341035
Nessus Name: SUSE SLES12: postgresql16 / postgresql16-contrib / postgresql16-devel / etc (SUSE-SU-2026:3794-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PostgreSQL 14.24/15.19/16.15/17.11/18.5

Timelineinfo

07/03/2026 CVE reserved
08/13/2026 +41 days Advisory disclosed
08/13/2026 +0 days VulDB entry created
08/31/2026 +17 days VulDB entry last update

Sourcesinfo

Product: postgresql.org

Advisory: postgresql.org
Status: Confirmed

CVE: CVE-2026-14669 (🔒)
GCVE (CVE): GCVE-0-2026-14669
GCVE (VulDB): GCVE-100-389416
CERT Bund: WID-SEC-2026-2844 - PostgreSQL: Mehrere Schwachstellen

Entryinfo

Created: 08/13/2026 15:37
Updated: 08/31/2026 01:23
Changes: 08/13/2026 15:37 (54), 08/16/2026 00:44 (7), 08/27/2026 16:02 (2), 08/31/2026 01:23 (12)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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