CVE-2026-63559

HighCVSS 7.5/10Last modified Oct 23, 2026

Description

An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to read out-of-bounds heap memory, potentially disclosing sensitive information.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-190

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
o6 Automation	open62541	>= 1.3.0, <= 1.3.17; >= 1.4.0, <= 1.4.16; >= 1.5.0, <= 1.5.4; master

References

Timeline

Published: Jul 30, 2026
Last modified: Oct 23, 2026
NVD status: Awaiting Analysis

Related CVEs from 2026

CVE-2026-63569.6A vulnerability in the web application allows standard users to escalate their privileges to those of a super administrator through paramete CVE-2026-635636.5Sharp and Toshiba Tec MFPs (multifunction printers) for a certain market have been shipped with the user authentication feature disabled in CVE-2026-635667.5Memory allocation with excessive size value in the DTLS handshake reassembly (DtlsReliableHandshake, DtlsReassembler) in Legion of the Bounc CVE-2026-635677.5Observable discrepancy in IesEngine.DecryptBlock in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has CVE-2026-635687.5Allocation of resources without limits or throttling in the CMP/CRMF password-based MAC verifier (PKMacBuilder) in Legion of the Bouncy Cast CVE-2026-635696.5Improper input validation in DHAgreement.CalculateAgreement (MTI/A0 two-pass Diffie-Hellman) in Legion of the Bouncy Castle Inc. bc-csharp b CVE-2026-63575.3pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python CVE-2026-635707.5Loop with unreachable exit condition in Pkcs12Store.GetCertificateChain in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an CVE-2026-635717.5Improper verification of cryptographic signature in the attribute certificate path validator (PkixAttrCertPathValidator, also used by PkixAt CVE-2026-635727.5Allocation of resources without limits in PKCS#12 keystore loading (Pkcs12Store.Load) in Legion of the Bouncy Castle Inc. bc-csharp before 2 CVE-2026-635737.5Observable discrepancy in the CMS RSA PKCS#1 v1.5 key-transport unwrap (KeyTransRecipientInformation.UnwrapKey) in Legion of the Bouncy Cast CVE-2026-635747.5Memory allocation with excessive size value in the OpenPGP signature and user attribute subpacket parsers (SignatureSubpacketsParser.ReadPac