PT-2026-31627 · Orthanc · Orthanc

Published 2026-04-09 · Updated 2026-04-09 · CVE-2026-5438

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Orthanc (affected versions not specified)

Description A gzip decompression bomb occurs when processing HTTP requests with Content-Encoding: gzip. The server does not limit decompressed size and allocates memory based on attacker-controlled compression metadata. A crafted gzip payload can cause excessive memory allocation and exhaust system memory.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-5438

Affected Products

Orthanc

References · 11

• https://security-tracker.debian.org/tracker/CVE-2026-5438 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-5438 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5438 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5438 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5438 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-5438 · Security Note
• https://kb.cert.org/vuls/id/536588 · Note
• https://twitter.com/CVEnew/status/2042302820540695031 · Twitter Post
• https://orthanc-server.com · Note
• https://twitter.com/VulmonFeeds/status/2042346734630666713 · Twitter Post
• https://machinespirits.de · Note