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CVE-2026-26267— rs-soroban-sdk #[contractimpl] macro calls inherent function instead of trait function when names collide

Quick assessment

Affected
stellar rs-soroban-sdk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rs-soroban-sdk是Stellar开源的一个Rust开发者工具包。 rs-soroban-sdk 22.0.10之前版本、23.5.2之前版本和25.1.1之前版本存在安全漏洞，该漏洞源于contractimpl宏在连接函数调用时存在缺陷，可能导致绕过安全检查。

CVSS 7.5 · High EPSS 0.52% · P43

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-26267

Vulnerability Information
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Vulnerability Title
rs-soroban-sdk #[contractimpl] macro calls inherent function instead of trait function when names collide
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
Source: CVE Program / CVE List V5
Vulnerability Title
rs-soroban-sdk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rs-soroban-sdk是Stellar开源的一个Rust开发者工具包。 rs-soroban-sdk 22.0.10之前版本、23.5.2之前版本和25.1.1之前版本存在安全漏洞，该漏洞源于contractimpl宏在连接函数调用时存在缺陷，可能导致绕过安全检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
stellar rs-soroban-sdk >= 25.0.0, < 25.1.1 -

II. Public POCs for CVE-2026-26267

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III. Intelligence Information for CVE-2026-26267

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Patches & Fixes for CVE-2026-26267 (1)

Vendor Advisories for CVE-2026-26267 (1)

IV. Related Vulnerabilities

Same product: rs-soroban-sdk
Same vendor: stellar
Same weakness: CWE-670

V. Comments for CVE-2026-26267

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