CVE-2022-1642Network attack vector

Service crash via mismatched JSON numeric casting

Published Jun 16, 2022 · Updated Aug 3, 2024

Denial of service in Swift Project swift-corelibs-foundation 5.6.1 and earlier allows remote attackers to crash services via crafted JSON. JSONDecoder validates a fractional numeric literal through one type-erased accessor but uses a different accessor for the checked integer cast, causing an abort. Reachability requires an application endpoint that passes attacker-controlled JSON to Codable decoding; the direct impact is a deterministic service crash.

CVSS severity7.5
High
EPSS probability0.64%
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 Swift Project swift-corelibs-foundation 5.6.1 and earlier allows remote attackers to crash services via crafted JSON. JSONDecoder validates a fractional numeric literal through one type-erased accessor but uses a different accessor for the checked integer cast, causing an abort. Reachability requires an application endpoint that passes attacker-controlled JSON to Codable decoding; the direct impact is a deterministic service crash.

The record

CVE
CVE-2022-1642
Published
Jun 16, 2022
Updated
Aug 3, 2024
Vendor
Swift Project
Product
swift-corelibs-foundation
Classifications
CWE-351, CWE-241, CWE-704, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=5.5.0 <unspecified
  2. Affected versionversion=unspecified <=5.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Swift Project · swift-corelibs-foundationversion=5.5.0 <unspecified; version=unspecified <=5.6.1

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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-351Insufficient Type Distinction
CWE-241Improper Handling of Unexpected Data Type
CWE-704Incorrect Type Conversion or Cast
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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