Vulnerability Description
soroban-sdk is a Rust SDK for Soroban contracts. Prior to 22.0.11, 23.5.3, and 25.3.0, The Fr (scalar field) types for BN254 and BLS12-381 in soroban-sdk compared values using their raw U256 representation without first reducing modulo the field modulus r. This caused mathematically equal field elements to compare as not-equal when one or both values were unreduced (i.e., >= r). The vulnerability requires an attacker to supply crafted Fr values through contract inputs, and compare them directly without going through host-side arithmetic operations. Smart contracts that rely on Fr equality checks for security-critical logic could produce incorrect results. The impact depends on how the affected contract uses Fr equality comparisons, but can result in incorrect authorization decisions or validation bypasses in contracts that perform equality checks on user-supplied scalar values. This vulnerability is fixed in 22.0.11, 23.5.3, and 25.3.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Stellar | Rs-Soroban-Sdk | < 22.0.11 |
Related Weaknesses (CWE)
References
- https://github.com/stellar/rs-soroban-sdk/security/advisories/GHSA-x2hw-px52-wp4MitigationPatchVendor Advisory
FAQ
What is CVE-2026-32322?
CVE-2026-32322 is a vulnerability with a CVSS score of 5.3 (MEDIUM). soroban-sdk is a Rust SDK for Soroban contracts. Prior to 22.0.11, 23.5.3, and 25.3.0, The Fr (scalar field) types for BN254 and BLS12-381 in soroban-sdk compared values using their raw U256 represent...
How severe is CVE-2026-32322?
CVE-2026-32322 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32322?
Check the references section above for vendor advisories and patch information. Affected products include: Stellar Rs-Soroban-Sdk.