Input Length Validation Flaw in Stellar XDR Library
CVE-2026-29795

4MEDIUM

Key Information:

Vendor

Stellar

Status
Rs-stellar-xdr
Vendor
CVE Published:
6 March 2026

What is CVE-2026-29795?

The Stellar XDR library contains an input length validation issue where the StringM::from_str method does not enforce maximum length constraints. This allows for the creation of StringM instances that exceed their defined limits, potentially leading to violations of expected behavior in serialization and data validation processes. Developers relying on this functionality are exposed to risks as the invalid instances may propagate through various components of the system. The problem has been addressed in version 25.0.1 with a patch that ensures proper length validation is enforced.

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Affected Version(s)

rs-stellar-xdr < 25.0.1

References

https://github.com/stellar/rs-stellar-xdr/security/adviso...
x_refsource_CONFIRM
https://github.com/stellar/rs-stellar-xdr/issues/499
x_refsource_MISC
https://github.com/stellar/rs-stellar-xdr/pull/500
x_refsource_MISC

CVSS V3.1

Score:
4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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