Dashboard / CVE-2026-5438

CVE-2026-5438

HIGH
MEDIUM Priority: 0.04 BB Relevance: 75/100
Published: 2026-04-09 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
orthanc-server orthanc < 1.12.11

References & Advisories (3)

https://kb.cert.org/vuls/id/536588
Third Party Advisory VDB Entry

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.48%
Raw Score 0.004840
Percentile 41.6%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00484
2026-10-28
0.00484

Intelligence Sources

nvd ref →

External Links