What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-09-30
• Weakness: CWE-125

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 products

• OFFIS DCMTK: through 3.7.0

References

• https://github.com/DCMTK/dcmtk
• https://github.com/DCMTK/dcmtk/blob/ccfd10b84ff3c9a40b7b331698aedf06d421fc43/dcmfg/libsrc/concatenationloader.cc#L334-L360
• https://github.com/DCMTK/dcmtk/blob/ccfd10b84ff3c9a40b7b331698aedf06d421fc43/dcmfg/libsrc/concatenationloader.cc#L399-L430
• https://github.com/DCMTK/dcmtk/commit/18379d5b8d234977cc30644e9e70d76d89c87285
• https://github.com/DCMTK/dcmtk/commit/c33790827a192a598d20463af701a8b819f46ec1
• https://support.dcmtk.org/redmine/issues/1281
• https://www.vulncheck.com/advisories/dcmtk-through-3.7.0-heap-over-read-via-numberofframes

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