CVE-2026-4738Network attack vector

Heap corruption via invalid pointer offset indexing

Published Mar 24, 2026 · Updated Mar 24, 2026

Memory-buffer bounds error in GDAL before 3.11.0 allows remote attackers to corrupt heap memory through crafted compressed data. inflate_table9 in frmts/zlib/contrib/infback9/inftree9.c decrements base and extra pointers before their allocated arrays, then indexes through those invalid pointers while building decompression tables. Exposure requires a consuming application to process attacker-controlled compressed input; successful corruption can execute code in that process, while network reachability depends on the application.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory-buffer bounds error in GDAL before 3.11.0 allows remote attackers to corrupt heap memory through crafted compressed data. inflate_table9 in frmts/zlib/contrib/infback9/inftree9.c decrements base and extra pointers before their allocated arrays, then indexes through those invalid pointers while building decompression tables. Exposure requires a consuming application to process attacker-controlled compressed input; successful corruption can execute code in that process, while network reachability depends on the application.

The record

CVE
CVE-2026-4738
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
Open Source Geospatial Foundation
Product
GDAL
Classifications
CWE-119, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.11.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Source Geospatial Foundation · GDALversion=0 <3.11.0

Published CVSS scores

9.4Government Technology Agency of Singapore Cyber Security GroupCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo