DEBIAN-CVE-2026-11946

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Source

https://security-tracker.debian.org/tracker/CVE-2026-11946

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11946.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-11946

Upstream

CVE-2026-11946

Published

2026-07-02T12:16:54Z

Modified

2026-09-14T17:01:41Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

An unauthenticated remote attacker can exhaust server memory via the GetEndpoints Discovery Service in open62541. The endpointUrl field of GetEndpointsRequest is not validated for length. An attacker can declare an arbitrarily large string (up to ~4.09 GB via the UInt32 length field) delivered across intermediate chunks without ever sending the final chunk. The server buffers all chunks in RAM indefinitely until the SecureChannel times out. The attack is pre-session and bypasses all encryption configurations. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.

References

https://security-tracker.debian.org/tracker/CVE-2026-11946

Affected packages

Debian:13 / open62541

Package

Name: open62541
Purl: pkg:deb/debian/open62541?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.11.1-1

1.4.18-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11946.json"

Debian:14 / open62541