CVE-2026-8086 OSGeo gdal SWapi.c SWnentries heap-based overflow

Medium 4.8 Published 7 May 2026 Updated 7 May 2026

A heap-based buffer overflow in GDAL's SWnentries function allows local attackers to execute arbitrary code or cause denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2026-8086?

CVE-2026-8086 is a medium-severity memory corruption vulnerability in OSGeo gdal, published on 7 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability was identified in OSGeo gdal up to 3.13.0dev-4. This issue affects the function SWnentries of the file frmts/hdf4/hdf-eos/SWapi.c. Such manipulation of the argument DimensionName leads to heap-based buffer overflow. The attack must be carried out locally. The exploit is publicly available and might be used. Upgrading to version 3.12.4RC1 is capable of addressing this issue. The name of the patch is 9491e794f1757f08063ea2f7a274ad2994afa636. It is advisable to upgrade the affected component.

Weakness: CWE-122, CWE-119

Which versions are affected by CVE-2026-8086?

2 open source packages ship an affected version, including gdal. It affects 1 product.

Package	Affected	Fixed in
`gdal` Bitnami	All versions	`3.13.0`
`gdal` PyPI	All versions	`3.13.0`

Products include Osgeo Gdal.

How do I fix CVE-2026-8086?

Upgrade gdal to 3.13.0 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-8086 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8086 exists.

Sources

Also known as AZL-86226, BIT-gdal-2026-8086, DEBIAN-CVE-2026-8086, ECHO-d971-6867-258c, GHSA-72pg-5w29-wjx6, JLSEC-2026-768 and 2 more.