Vulnerability · Published Sep 24, 2026 · Assigned by VulnCheck

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

High 8.2

In plain English

A high-severity out-of-bounds read in DCMTK from OFFIS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.3%top 72.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	dcmtk	no fix listed	DEBIAN-CVE-2026-97059
Debian:13	dcmtk	no fix listed	DEBIAN-CVE-2026-97059
Debian:14	dcmtk	no fix listed	DEBIAN-CVE-2026-97059
Ubuntu:26.04:LTS	dcmtk	no fix listed	UBUNTU-CVE-2026-97059
Ubuntu:26.10	dcmtk	no fix listed	UBUNTU-CVE-2026-97059

Affected products (as reported)

Vendor	Product	Versions
OFFIS	DCMTK	0 – through 3.7.0

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

References

DCMTK Redmine Issue #1281 issue-tracking
Fixed heap over-read in ConcatenationLoader patch
Validate buffer length in extractBinaryFrames patch
https://github.com/DCMTK/dcmtk/blob/ccfd10b84ff3c9a40b7b331698aedf06d421fc43/dcmfg/libsrc/concatenationloader.cc#L334-L360 technical-description
https://github.com/DCMTK/dcmtk/blob/ccfd10b84ff3c9a40b7b331698aedf06d421fc43/dcmfg/libsrc/concatenationloader.cc#L399-L430 technical-description
https://github.com/DCMTK/dcmtk product
VulnCheck Advisory: DCMTK through 3.7.0 Heap Over-read via NumberOfFrames third-party-advisory