Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M

CVE-2026-33147GMT: Stack-based Buffer Overflow in gmt_remote_dataset_id

High 7.3

In plain English

A high-severity stack buffer overflow in gmt from GenericMappingTools. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.2%top 89.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

GMT is an open source collection of command-line tools for manipulating geographic and Cartesian data sets. In versions from 6.6.0 and prior, a stack-based buffer overflow vulnerability was identified in the gmt_remote_dataset_id function within src/gmt_remote.c. This issue occurs when a specially crafted long string is passed as a dataset identifier (e.g., via the which module), leading to a crash or potential arbitrary code execution. This issue has been patched via commit 0ad2b49.

Affected products (as reported)

Vendor	Product	Versions
GenericMappingTools	gmt	<= 6.6.0

Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References

https://github.com/GenericMappingTools/gmt/security/advisories/GHSA-fqxx-62x7-9gwg x_refsource_CONFIRM
https://github.com/GenericMappingTools/gmt/commit/0ad2b491470df82c9ec1139dcbd70502fa28a082 x_refsource_MISC