CVE-2026-4738

GDAL Bundled zlib (inftree9.c) Pointer Offset Optimization Undefined Behavior Allows Heap Corruption or Remote Code Execution

Critical9.4EPSS 0.26%

Published: 24 Mar 2026
Updated: 24 Mar 2026
Reserved: 24 Mar 2026
Assigned by: GovTech CSG

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.

Scores

CVSS scores of CVE-2026-4738, by who scored it
Scored by	CVSS	Score	Vector
GovTech CSGCNA (assigner)	4.0	Critical9.4	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:L/U:Amber
NVDNVD · Awaiting Analysis	4.0	Critical9.4	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:C/RE:L/U:Amber

EPSS (exploitation in 30 days): 0.26% · top 82% of all CVEs (6 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.4.

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer (opens in a new tab)All about CWE-119 and its CVEs

Affected products

OSGeo · gdal
- affected < 3.11.0

References (1)

https://github.com/OSGeo/gdal/pull/12244 (opens in a new tab)patch

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated 24 Mar 2026, 14:35 UTC.