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

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-20 · updated 2026-06-17
Weakness: CWE-121

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

GenericMappingTools gmt: through 6.6.0

References

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

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