CVE-2024-4420Public exploitNetwork attack vector

Service crash via malformed or deeply nested JSON

Published May 21, 2024 · Updated Aug 1, 2024

Denial of service in Google Tink C++ before 2.1.3 allows remote authenticated users to crash consuming binaries via JSON keysets. JsonKeysetReader treats any syntactically valid JSON value as an object and recursively parses deeply nested objects, causing an invalid object access or stack overflow. Reachability requires authenticated access, user interaction, and a consuming application that passes attacker-controlled keyset data to the reader.

CVSS severity6.8
Medium
EPSS probability0.23%
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 Google Tink C++ before 2.1.3 allows remote authenticated users to crash consuming binaries via JSON keysets. JsonKeysetReader treats any syntactically valid JSON value as an object and recursively parses deeply nested objects, causing an invalid object access or stack overflow. Reachability requires authenticated access, user interaction, and a consuming application that passes attacker-controlled keyset data to the reader.

The record

CVE
CVE-2024-4420
Published
May 21, 2024
Updated
Aug 1, 2024
Vendor
Google
Product
Tink
Classifications
CWE-116, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 <=1.7.0
  2. Affected versionversion=2.0.0 <2.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Google · Tinkversion=0 <=1.7.0; version=2.0.0 <2.1.3

Published CVSS scores

6.8Google Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:X/V:D/RE:L/U:Green

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1499Endpoint Denial of Service

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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