CVE-2024-35229Network attack vector

Contract behavior manipulation via incorrect Yul argument order

Published May 27, 2024 · Updated Sep 3, 2024

Incorrect evaluation in Matter Labs ZKsync Solidity Compiler before 1.3.10 allows attackers to alter bytecode via crafted Yul. The Yul function-call lowering code iterates arguments in source order even though Yul requires right-to-left evaluation, so side-effecting arguments run in the wrong order. Exploitation requires side-effecting nested calls in the specific pattern; affected compilation can encode an unintended execution sequence in contract bytecode.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect evaluation in Matter Labs ZKsync Solidity Compiler before 1.3.10 allows attackers to alter bytecode via crafted Yul. The Yul function-call lowering code iterates arguments in source order even though Yul requires right-to-left evaluation, so side-effecting arguments run in the wrong order. Exploitation requires side-effecting nested calls in the specific pattern; affected compilation can encode an unintended execution sequence in contract bytecode.

The record

CVE
CVE-2024-35229
Published
May 27, 2024
Updated
Sep 3, 2024
Vendor
Matter Labs
Product
ZKsync Solidity Compiler
Classifications
CWE-696
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.3.10
  2. Affected versionversion=< 1.3.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Matter Labs · ZKsync Solidity Compilerversion=0 <1.3.10; version=< 1.3.10

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-696Incorrect Behavior Order

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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