Vulnerability Description
stellar-xdr is a library and CLI containing types and functionality for working with Stellar XDR. Prior to version 25.0.1, StringM::from_str does not validate that the input length is within the declared maximum (MAX). Calling StringM::<N>::from_str(s) where s is longer than N bytes succeeds and returns an Ok value instead of Err(Error::LengthExceedsMax), producing a StringM that violates its length invariant. This affects any code that constructs StringM values from string input using FromStr (including str::parse), and relies on the type's maximum length constraint being enforced. An oversized StringM could propagate through serialization, validation, or other logic that assumes the invariant holds. This issue has been patched in version 25.0.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Stellar | Stellar-Xdr | < 25.0.1 |
Related Weaknesses (CWE)
References
- https://github.com/stellar/rs-stellar-xdr/commit/1f840013c3e2fca0321fb844b048afaPatch
- https://github.com/stellar/rs-stellar-xdr/issues/499Issue Tracking
- https://github.com/stellar/rs-stellar-xdr/pull/500Issue TrackingPatch
- https://github.com/stellar/rs-stellar-xdr/security/advisories/GHSA-x57h-xx53-v53MitigationPatchVendor Advisory
FAQ
What is CVE-2026-29795?
CVE-2026-29795 is a vulnerability with a CVSS score of 4.0 (MEDIUM). stellar-xdr is a library and CLI containing types and functionality for working with Stellar XDR. Prior to version 25.0.1, StringM::from_str does not validate that the input length is within the decla...
How severe is CVE-2026-29795?
CVE-2026-29795 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-29795?
Check the references section above for vendor advisories and patch information. Affected products include: Stellar Stellar-Xdr.