Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/moov-io/signedxml/commit/da2cd6126c4c53b7e59a367d287786e6f6a2
- https://github.com/moov-io/signedxml/releases/tag/v1.4.1
- https://github.com/moov-io/signedxml/security/advisories/GHSA-5588-rp99-5fjh
FAQ
What is CVE-2026-113729?
CVE-2026-113729 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ever...
How severe is CVE-2026-113729?
CVE-2026-113729 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-113729?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.