CVE-2022-30633Network attack vector

Program crash via unbounded recursive XML unmarshaling

Published Aug 9, 2022 · Updated Mar 9, 2026

Uncontrolled recursion in Go encoding/xml before 1.17.12 and 1.18.0-0 through 1.18.3 allows attackers to crash programs via crafted XML. Decoder.DecodeElement descends through nested struct fields tagged "any" without enforcing a maximum unmarshal depth, exhausting the process stack. The consuming program must unmarshal attacker-controlled XML into that struct shape; successful exploitation causes a panic and service interruption.

CVSS severity7.5
High
EPSS probability1.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in Go encoding/xml before 1.17.12 and 1.18.0-0 through 1.18.3 allows attackers to crash programs via crafted XML. Decoder.DecodeElement descends through nested struct fields tagged "any" without enforcing a maximum unmarshal depth, exhausting the process stack. The consuming program must unmarshal attacker-controlled XML into that struct shape; successful exploitation causes a panic and service interruption.

The record

CVE
CVE-2022-30633
Published
Aug 9, 2022
Updated
Mar 9, 2026
Vendor
Go standard library
Product
encoding/xml
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 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=0 <1.17.12
  2. Affected versionversion=1.18.0-0 <1.18.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · encoding/xmlversion=0 <1.17.12; version=1.18.0-0 <1.18.4

Published CVSS scores

7.5NVDCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499.004Application or System Exploitation

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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