CVE-2026-113729

HighCVSS 7.5

Published: 20/10/2026(UTC)Updated: 22/10/2026(UTC)Translated: 21/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.47%

39th percentile - higher than 39% of all known CVEs

Summary

In Moov signedxml prior to 1.4.1, ExclusiveCanonicalization copies the complete accumulated namespace map at every nested element before reference digest or signature checks. Attacker-controlled XML with deeply nested elements and many unused namespace declarations causes quadratic memory allocation growth, allowing a small document to consume gigabytes of memory and terminate the process.

Risk Assessment

An unauthenticated attacker can cause a denial of service by exhausting memory in the process handling signed XML.

Recommendation

Update signedxml to version 1.4.1 or later and consider limits on the size and depth of processed XML.

Other vulnerabilities in Moov signedxml

CVE-2023-34205Critical
In Moov signedxml through 1.0.0, parsing the raw XML can result in different output than parsing the canonicalized XML. This allows for bypassing signature validation via a Signature Wrapping attack (XSW).

Original NVD description (English source)

Moov signedxml is a pure Go library for processing signed XML documents. Prior to 1.4.1, ExclusiveCanonicalization in exclusivecanonicalization.go copies the complete accumulated namespace map at every nested element before reference digest or signature checks. Attacker-controlled XML containing deeply nested elements with many unused namespace declarations causes quadratic allocation growth with depth and linear growth with prefixes per level, allowing a comparatively small document to consume multiple gigabytes of memory and terminate the process. The condition is reachable through ValidateReferences without a valid signature, matching certificate, or prior authentication, and it does not bypass signature verification. This issue is fixed in version 1.4.1.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS