CVE-2026-4738 Memory corruption in gdal
An attacker can trigger heap corruption or remote code execution in GDAL via undefined behavior in the bundled zlib component.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-4738?
CVE-2026-4738 is a critical memory corruption vulnerability in OSGeo gdal, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C.
This issue affects gdal: before 3.11.0.
Weakness: CWE-119
Which versions are affected by CVE-2026-4738?
1 open source package ship an affected version, including gdal.
| Package | Affected | Fixed in |
|---|---|---|
gdal Bitnami | All versions | 3.11.0 |
How do I fix CVE-2026-4738?
Upgrade gdal to 3.11.0 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-4738 being exploited?
There is no known exploitation of CVE-2026-4738 in the wild and no public exploit code.
Sources
Also known as AZL-104972, BIT-gdal-2026-4738, DEBIAN-CVE-2026-4738, ECHO-c616-5e6d-4a3e, GHSA-hp6p-5qh5-w9fj, JLSEC-2026-288 and 1 more.