# CVE-2024-34704

## Summary

- **CVE ID:** CVE-2024-34704
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
- **CWE:** CWE-682
- **Published:** May 13, 2024
- **Last Modified:** Mar 13, 2026

## Description

era-compiler-solidity is the ZKsync compiler for Solidity.  The problem occurred during instruction selection in the `DAGCombine` phase while visiting the XOR operation. The issue arises when attempting to fold the expression `!(x cc y)` into `(x !cc y)`. To perform this transformation, the second operand of XOR should be a constant representing the true value. However, it was incorrectly assumed that -1 represents the true value, when in fact, 1 is the correct representation, so this transformation for this case should be skipped. This vulnerability is fixed in 1.4.1.

## Affected Products

- matter-labs — era-compiler-solidity (>= 1.2.0, <= 1.4.0)

## References

- [CNA](https://github.com/matter-labs/era-compiler-solidity/security/advisories/GHSA-22pj-7cvw-r3gc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._