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CVE-2026-26267
February 19, 2026
soroban-sdk is a Rust SDK for Soroban contracts. Prior to versions 22.0.10, 23.5.2, and 25.1.1, the "#[contractimpl]" macro contains a bug in how it wires up function calls. "#[contractimpl]" generates code that uses "MyContract::value()" style calls even when it's processing the trait version. This means if an inherent function is also defined with the same name, the inherent function gets called instead of the trait function. This means the Wasm-exported entry point silently calls the wrong function when two conditions are met simultaneously: First, an "impl Trait for MyContract" block is defined with one or more functions, with "#[contractimpl]" applied. Second, an "impl MyContract" block is defined with one or more identically named functions, without "#[contractimpl]" applied. If the trait version contains important security checks, such as verifying the caller is authorized, that the inherent version does not, those checks are bypassed. Anyone interacting with the contract through its public interface will call the wrong function. The problem is patched in "soroban-sdk-macros" versions 22.0.10, 23.5.2, and 25.1.1. The fix changes the generated call from "<Type>::func()" to "<Type as Trait>::func()" when processing trait implementations, ensuring Rust resolves to the trait associated function regardless of whether an inherent function with the same name exists. Users should upgrade to "soroban-sdk-macros" 22.0.10, 23.5.2, or 25.1.1 and recompile their contracts. If upgrading is not immediately possible, contract developers can avoid the issue by ensuring that no inherent associated function on the contract type shares a name with any function in the trait implementation. Renaming or removing the conflicting inherent function eliminates the ambiguity and causes the macro-generated code to correctly resolve to the trait function.
Affected Packages
https://github.com/stellar/rs-soroban-sdk.git (GITHUB):
Affected version(s) >=v25.0.0 <v25.1.1
Fix Suggestion:
Update to version v25.1.1
https://github.com/stellar/rs-soroban-sdk.git (GITHUB):
Affected version(s) >=v23.0.0 <v23.5.2
Fix Suggestion:
Update to version v23.5.2
https://github.com/stellar/rs-soroban-sdk.git (GITHUB):
Affected version(s) >=v0.0.3 <v22.0.10
Fix Suggestion:
Update to version v22.0.10
soroban-sdk-macros (RUST):
Affected version(s) >=23.0.0 <23.5.2
Fix Suggestion:
Update to version 23.5.2
soroban-sdk-macros (RUST):
Affected version(s) >=25.0.0 <25.1.1
Fix Suggestion:
Update to version 25.1.1
soroban-sdk-macros (RUST):
Affected version(s) >=0.0.2 <22.0.10
Fix Suggestion:
Update to version 22.0.10
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Always-Incorrect Control Flow Implementation
EPSS
Base Score:
0.04