CVE-2026-52878Public exploitNetwork attack vector

Unauthenticated node crash via nil RawData dereference

Published Aug 7, 2026 · Updated Aug 7, 2026

NULL pointer dereference in Klever klever-go 1.7.14 through 1.7.17 allows remote attackers to crash nodes via P2P transactions. txVersionChecker.CheckTxVersion reads tx.RawData.Version after protobuf decoding permits the RawData submessage to remain nil. Any ordinary libp2p peer can reach the synchronous, recovery-free validator; one crafted message crashes a node, and targeting enough validators halts block production.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Klever klever-go 1.7.14 through 1.7.17 allows remote attackers to crash nodes via P2P transactions. txVersionChecker.CheckTxVersion reads tx.RawData.Version after protobuf decoding permits the RawData submessage to remain nil. Any ordinary libp2p peer can reach the synchronous, recovery-free validator; one crafted message crashes a node, and targeting enough validators halts block production.

The record

CVE
CVE-2026-52878
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
Klever
Product
klever-go
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 2026Record 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=>= 1.7.14, < 1.7.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Klever · klever-goversion=>= 1.7.14, < 1.7.18

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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