CVE-2024-34156Network attack vector

Process crash via unchecked ignored-field recursion

Published Sep 6, 2024 · Updated Sep 26, 2024

Denial of service in Go standard library encoding/gob before 1.22.7 and 1.23.0 allows attackers to crash a decoder with a crafted message. Decoder.decIgnoreOpFor inconsistently enforces ignored-field recursion depth, so decoding an extremely deeply nested ignored struct exhausts the stack. An application must pass attacker-controlled gob data to Decoder.Decode or Decoder.DecodeValue; the resulting panic interrupts that process.

CVSS severity7.5
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Go standard library encoding/gob before 1.22.7 and 1.23.0 allows attackers to crash a decoder with a crafted message. Decoder.decIgnoreOpFor inconsistently enforces ignored-field recursion depth, so decoding an extremely deeply nested ignored struct exhausts the stack. An application must pass attacker-controlled gob data to Decoder.Decode or Decoder.DecodeValue; the resulting panic interrupts that process.

The record

CVE
CVE-2024-34156
Published
Sep 6, 2024
Updated
Sep 26, 2024
Vendor
Go standard library
Product
encoding/gob
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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 <1.22.7
  2. Affected versionversion=1.23.0-0 <1.23.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · encoding/gobversion=0 <1.22.7; version=1.23.0-0 <1.23.1

Published CVSS scores

7.5CISA-ADPCVSS: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.

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

T1499.004Application or System Exploitation

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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