# CVE-2026-97059: DCMTK through 3.7.0 Heap Over-read via NumberOfFrames

> Attackers can cause crashes or leak memory by sending crafted DICOM files with mismatched frame counts to applications using DCMTK.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-97059, GHSA-4pm7-3ffj-xfrq, UBUNTU-CVE-2026-97059

## What is CVE-2026-97059?

CVE-2026-97059 is a high-severity memory corruption vulnerability in OFFIS DCMTK, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

DCMTK through 3.7.0 contains a heap over-read vulnerability in ConcatenationLoader that copies pixel data frames without validating the PixelData buffer length against the declared NumberOfFrames. Attackers can craft malicious DICOM instances declaring more frames than the buffer contains to trigger heap over-reads that crash the application or leak adjacent heap memory.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-97059?


## How do I fix CVE-2026-97059?

No fix has been published for CVE-2026-97059 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-97059 being exploited?

There is no known exploitation of CVE-2026-97059 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-97059 and fix it if it is affected.

What it is: CVE-2026-97059 is a high-severity memory corruption vulnerability in OFFIS DCMTK, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-97059 in the wild and no public exploit code.

Affected product: OFFIS DCMTK. 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-2026-97059/ (Markdown: https://insights.sbomify.com/CVE-2026-97059/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-97059
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-97059
- OSV: https://osv.dev/vulnerability/CVE-2026-97059

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-97059/
Summaries are generated and may contain mistakes; the official description above is the record.