What is CVE-2022-25761?

CVE-2022-25761 is a high-severity vulnerability in Open62541, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2022-08-23.

How severe is CVE-2022-25761?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2022-25761 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Open62541

CVE-2022-25761

The package open62541/open62541 before 1.2.5, from 1.3-rc1 and before 1.3.1 are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.

Published 2022-08-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000

Affected products

Open62541 — versions 1.3
Fedoraproject Fedora — versions 37
Open62541/open62541 — versions unspecified, 1.3-rc1

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

References

security.snyk.io/vuln/SNYK-UNMANAGED-OPEN62541OPEN62541-2988719 (Patch, Third Party Advisory)
github.com/open62541/open62541/commit/b79db1ac78146fc06b0b8435773d3967de2d659c (Patch, Third Party Advisory)
github.com/open62541/open62541/pull/5173 (Patch, Third Party Advisory)
github.com/open62541/open62541/releases/tag/v1.2.5 (Third Party Advisory, Release Notes)
github.com/open62541/open62541/releases/tag/v1.3.1 (Third Party Advisory, Release Notes)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2022-25761?: CVE-2022-25761 is a high-severity vulnerability in Open62541, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2022-08-23.
How severe is CVE-2022-25761?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2022-25761 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.