WinMagic
Security Advisory
CVE-2026-105481 — HTTP Keep-Alive Response Desynchronization
Reference: KB-SEC-2026-1028-07 | Published: October 28, 2026 | Status: Not Affected
Applies to: SecureDoc Client, SES Console, SESWeb (all versions)
Third-party component affected: Node.js | Severity: Medium
Executive summary
WinMagic is aware of CVE-2026-105481 (HTTP Keep-Alive Response Desynchronization), a vulnerability affecting Node.js. WinMagic has reviewed this CVE against SecureDoc Client, the SES Console and SESWeb. None of these products is affected, for the reason given below. No remediation, patch, or configuration change is required in response to this CVE.
Vulnerability details
CVE ID | CVE-2026-105481 |
Title | HTTP Keep-Alive Response Desynchronization |
Affected third-party component | Node.js |
Severity | Medium |
CVSS | Not published by the Node.js project as a numeric score; the Node.js security release and downstream advisories rate it Medium severity. |
Affected versions (upstream) | Node.js 26.x, 24.x, and 22.x lines prior to the October 2026 security release. |
What the vulnerability is
A race condition in Node.js's HTTP keep-alive connection handling can cause a response to be associated with the wrong request when a connection is reused for multiple requests in sequence.
Why you should pay attention
Mismatched request/response pairing on a reused connection is a classic ingredient of response smuggling and desynchronization attacks. Depending on how an application and any intermediary caches or routes traffic, the practical consequences can include cache poisoning, authentication bypass, or one user receiving a response intended for another user on a shared or pooled connection.
WinMagic product assessment
SecureDoc Client, SES Console, and SESWeb
SecureDoc does not include, install or depend on a Node.js runtime.
Conclusion: SecureDoc Client, the SES Console and SESWeb are not affected by CVE-2026-105481.
Remediation
No WinMagic product-specific remediation, software update, patch, or configuration change is required in response to CVE-2026-105481. Organizations that run Node.js elsewhere in their own environment, outside of WinMagic products, should apply that vendor's own patch according to their standard process.
Ongoing monitoring
WinMagic continues to monitor relevant security advisories and available information concerning CVE-2026-105481. Should new information materially change this assessment, WinMagic will review its potential impact on SecureDoc Client, the SES Console or SESWeb and update this article accordingly.
Questions about this advisory
Customers with questions about this assessment can contact WinMagic Support through the usual support channel referencing KB-SEC-2026-1028-07.
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