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

> A stack-based buffer overflow in GMT allows attackers to cause crashes or execute arbitrary code via crafted dataset identifiers.

- **Severity:** High 7.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Mar 2026
- **Updated:** 25 Mar 2026
- **Also known as:** GHSA-fqxx-62x7-9gwg

## What is CVE-2026-33147?

CVE-2026-33147 is a high-severity memory corruption vulnerability in GenericMappingTools gmt, published on 20 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### 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.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-33147?

It affects 1 product.


Products: Generic-Mapping-Tools Gmt.

## How do I fix CVE-2026-33147?

No fix has been published for CVE-2026-33147 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-33147 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33147 exists.

Public exploit code:

- CVE-2026-33147(Stack-based Buffer Overflow in gmt_remote_dataset_id) (github_poc): https://github.com/redyank/CVE-2026-33147

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-33147 and fix it if it is affected.

What it is: CVE-2026-33147 is a high-severity memory corruption vulnerability in GenericMappingTools gmt, published on 20 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33147 exists.

Affected product: GenericMappingTools gmt. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-33147/ (Markdown: https://insights.sbomify.com/CVE-2026-33147/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-33147
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33147
- OSV: https://osv.dev/vulnerability/CVE-2026-33147

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-33147/
Summaries are generated and may contain mistakes; the official description above is the record.