Bug 2496405 (CVE-2026-33592) - CVE-2026-33592 open62541: open62541: Remote attacker can cause Denial of Service via FindServers Discovery Service
Summary: CVE-2026-33592 open62541: open62541: Remote attacker can cause Denial of Serv...
Keywords:
Status: NEW
Alias: CVE-2026-33592
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2496477
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-02 08:01 UTC by OSIDB Bzimport
Modified: 2026-07-02 12:06 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-07-02 08:01:25 UTC 
An unauthenticated remote attacker can exhaust
server memory via the FindServers Discovery Service in open62541. The
serverUris field of FindServersRequest is not validated for length or array
size. An attacker can declare an arbitrarily large string (up to ~3.9 GB)
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 configuration. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Note You need to log in before you can comment on or make changes to this bug.