Stack Exhaustion Vulnerability in DecodeElement of Go Programming Language
CVE-2026-56859

Currently unrated

Key Information:

Vendor: Go Standard Library
Status: Encoding/xml
Vendor: CVE Published:; 13 August 2026

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What is CVE-2026-56859?

The DecodeElement in the Go programming language contains a flaw where the depth counter gets reset incorrectly, preventing it from firing, which can ultimately lead to stack exhaustion. This vulnerability can impact the application's stability and performance, posing risks during execution. Developers should ensure they are using updated versions of the Go programming language to mitigate this issue and enhance their application's security.

Affected Version(s)

encoding/xml 0 < 1.25.13

encoding/xml 1.26.0-0 < 1.26.6

encoding/xml 1.27.0-0 < 1.27.0-rc.3

References

https://go.dev/issue/80481

https://go.dev/cl/803320

https://groups.google.com/g/golang-announce/c/94pEornpRlI

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Timeline

Vulnerability published
Aug 13, 2026
Vulnerability Reserved
Jun 23, 2026

CVE-2026-56859 Data

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