What’s Vulnerable › Vulnerabilities

CVE-2026-73515: PostGIS < 3.7.0beta2 Out-of-Bounds Read via FlatGeobuf Buffer

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-09-24
• Weakness: CWE-125

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.

Affected products

• PostGIS: before 3.7.0beta2 — fixed in 3.7.0beta2

How to fix

Upgrade to a fixed version: PostGIS 3.7.0beta2. Check the vendor advisory for mitigations.

References

• https://gitea.osgeo.org/postgis/postgis/raw/tag/3.7.0beta2/NEWS
• https://mehmetince.net/part-1-6-systemic-risks-in-the-managed-postgresql-industry-extension-risks-are-real-exploiting-postgis-memory-corruption-bug-at-neondb-supabase-and-many-more/
• https://www.vulncheck.com/advisories/postgis-0beta2-out-of-bounds-read-via-flatgeobuf-buffer

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