Out-of-Bounds Read Vulnerability in PostGIS by OSGeo
CVE-2026-73515

7.2HIGH

Key Information:

Vendor

Postgis

Status
Postgis
Vendor
CVE Published:
13 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-73515?

PostGIS, a widely used geospatial database extender, has an out-of-bounds read vulnerability that occurs when a malformed FlatGeobuf buffer is processed. The vulnerability allows attackers to exploit the weakness in the property metadata decoder, which verifies the existence of a string length field but neglects to check that the subsequent string body falls within the bounds of the supplied buffer. This oversight can lead to unauthorized memory disclosures and potentially crash the server, impacting overall application stability and security.

Affected Version(s)

PostGIS 0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-73515 - Proof of Concept

References

https://mehmetince.net/part-1-6-systemic-risks-in-the-man...
technical-descriptionexploit
https://gitea.osgeo.org/postgis/postgis/raw/tag/3.7.0beta...
release-notes
https://www.vulncheck.com/advisories/postgis-0beta2-out-o...
third-party-advisory

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mehmet Ince (@mdisec)
.