CVE-2024-34360Network attack vector

Undeserved rewards via stale previous ATX acceptance

Published May 10, 2024 · Updated Aug 2, 2024

Improper ATX validation in Spacemesh go-spacemesh before 1.5.2-hotfix1 allows remote attackers to obtain undeserved rewards. The incoming-ATX handler accepts a PrevATXID that identifies an earlier ATX instead of requiring the smesher's latest published ATX. An unauthenticated peer retaining PoST data for less than one epoch can remain reward-eligible and claim a full tick amount.

CVSS severity8.2
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper ATX validation in Spacemesh go-spacemesh before 1.5.2-hotfix1 allows remote attackers to obtain undeserved rewards. The incoming-ATX handler accepts a PrevATXID that identifies an earlier ATX instead of requiring the smesher's latest published ATX. An unauthenticated peer retaining PoST data for less than one epoch can remain reward-eligible and claim a full tick amount.

The record

CVE
CVE-2024-34360
Published
May 10, 2024
Updated
Aug 2, 2024
Vendor
Spacemesh
Product
go-spacemesh
Classifications
CWE-754, T1657
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 <1.5.2-hotfix1
  2. Affected versionversion=< 1.5.2-hotfix1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spacemesh · go-spacemeshversion=0 <1.5.2-hotfix1; version=< 1.5.2-hotfix1

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1657Financial Theft

Public exploit references

No public exploit references are available in this record.

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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