CVE-2026-5438 — Gzip Decompression Bomb via Content-Encoding Header

CVE-2026-5438

Gzip Decompression Bomb via Content-Encoding Header PUBLISHED

Description (CNA)

A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The server does not enforce limits on decompressed size and allocates memory based on attacker-controlled compression metadata. A specially crafted gzip payload can trigger excessive memory allocation and exhaust system memory.

Affected (CNA)

Vendor / product	Versions
Orthanc / DICOM Server	affected 0 through 1.12.10

CWE

No CWE identifiers supplied.

References

https://www.orthanc-server.com/
https://www.machinespirits.de/
https://kb.cert.org/vuls/id/536588

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.