CVE-2023-35163Public exploitNetwork attack vector

Ledger manipulation via replayed Ethereum bridge events

Published Jun 23, 2023 · Updated Nov 7, 2024

Improper input validation in Vega Protocol's Vega before 0.71.6 allows remote authenticated users to replay Ethereum bridge events. On-chain verification compares block number and log index but omits the Ethereum transaction hash, while replay protection trusts the mutable ChainEvent txId. A validator key is required; a replayed deposit can mint unbacked account credit, and other event types can alter voting power or block withdrawals.

CVSS severity6.0
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Vega Protocol's Vega before 0.71.6 allows remote authenticated users to replay Ethereum bridge events. On-chain verification compares block number and log index but omits the Ethereum transaction hash, while replay protection trusts the mutable ChainEvent txId. A validator key is required; a replayed deposit can mint unbacked account credit, and other event types can alter voting power or block withdrawals.

The record

CVE
CVE-2023-35163
Published
Jun 23, 2023
Updated
Nov 7, 2024
Vendor
Vega
Product
Vega
Classifications
CWE-20, T1565.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 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=< 0.71.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Vega · Vegaversion=< 0.71.6
Vega · Vega Functionsversion=0 <0.71.6

Published CVSS scores

6.0GitHubCVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1565.002Transmitted Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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