PostGIS 2.3.3 FlatGeobuf property metadata decoder out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k2.01

Summaryinfo

A vulnerability was found in PostGIS. It has been classified as critical. Affected by this vulnerability is an unknown functionality of the component FlatGeobuf property metadata decoder. This manipulation causes out-of-bounds. This vulnerability appears as CVE-2026-73515. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in PostGIS. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component FlatGeobuf property metadata decoder. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

PostGIS before 3.7.0beta2 contains an out-of-bounds read vulnerability that allows attackers to cause memory disclosure or a server crash by supplying a malformed FlatGeobuf buffer. The FlatGeobuf property metadata decoder verifies that a string length field is present but fails to verify that the subsequent string body is contained within the supplied buffer before materializing it into a SQL-visible value, enabling memory disclosure or denial of service.

The advisory is shared at mehmetince.net. This vulnerability is known as CVE-2026-73515 since 08/12/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are unknown but an exploit is available.

It is possible to download the exploit at mehmetince.net. It is declared as proof-of-concept.

Upgrading to version 3.7.0beta2 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PostGIS 3.7.0beta2

Timelineinfo

08/12/2026 CVE reserved
08/13/2026 +1 days Advisory disclosed
08/13/2026 +0 days VulDB entry created
08/13/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: mehmetince.net
Status: Confirmed

CVE: CVE-2026-73515 (🔒)
GCVE (CVE): GCVE-0-2026-73515
GCVE (VulDB): GCVE-100-389653
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/13/2026 18:15
Changes: 08/13/2026 18:15 (56)
Complete: 🔍
Cache ID: 216::103

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