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CVE-2026-29795

HIGH CVSS 3.1: 7.5 EPSS 0.03%
Updated Mar 18, 2026
Stellar
Parameter Value
CVSS 7.5 (HIGH)
Affected Versions before 25.0.1
Fixed In 25.0.1
Type CWE-770 (Allocation Without Limits)
Vendor Stellar
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Stellar Stellar-Xdr
cpe:2.3:a:stellar:stellar-xdr:*:*:*:*:*:rust:*:*
25.0.1