PostGIS < 3.7.0beta2 Out-of-Bounds Read via FlatGeobuf Buffer (CVE-2026-73515) | HOL Guard CVE

High · CVSS 8.1CVE-2026-73515

PostGIS < 3.7.0beta2 Out-of-Bounds Read via FlatGeobuf Buffer

Answer in brief

CVE-2026-73515 records a High severity (CVSS 8.1) vulnerability in PostGIS < 3.7.0beta2 Out-of-Bounds Read via FlatGeobuf Buffer. The current sources do not mark it as known exploited. The current feed maps PostGIS/PostGIS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Aug 14, 2026Source checked Sep 27, 2026First seen by HOL Aug 13, 2026Material review Aug 14, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps PostGIS/PostGIS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
PostGIS/PostGISgeneric	>=0 <3.7.0beta2	3.7.0beta2

Recommended response

Check inventory. Check lockfiles and deployed manifests for PostGIS/PostGIS.
Review the reported fix. Update PostGIS/PostGIS to 3.7.0beta2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.