Dashboard / CVE-2026-5440

CVE-2026-5440

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 memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header. The server allocates memory directly based on the attacker supplied header value without enforcing an upper limit. A crafted HTTP request containing an extremely large `Content-Length` value can trigger excessive memory allocation and server termination, even without sending a request body.

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

0.57%
Raw Score 0.005660
Percentile 46.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00566
2026-10-28
0.00566

Intelligence Sources

nvd ref →

External Links