CVE-2022-24726Network attack vector

Control plane crash via unbounded webhook parsing

Published Mar 10, 2022 · Updated Apr 23, 2025

Denial of service in Istio before 1.11.8, 1.12.0 through 1.12.4, and 1.13.0 through 1.13.1 allows remote attackers to crash istiod. The validating and mutating webhook handlers read an unbounded HTTP request body, permitting oversized or deeply nested regular-expression input to exhaust the Go process stack. The unauthenticated TLS endpoint is normally cluster-internal on port 15017; public exposure makes the service interrupt remotely reachable.

CVSS severity7.5
High
EPSS probability1.59%
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 Istio before 1.11.8, 1.12.0 through 1.12.4, and 1.13.0 through 1.13.1 allows remote attackers to crash istiod. The validating and mutating webhook handlers read an unbounded HTTP request body, permitting oversized or deeply nested regular-expression input to exhaust the Go process stack. The unauthenticated TLS endpoint is normally cluster-internal on port 15017; public exposure makes the service interrupt remotely reachable.

The record

CVE
CVE-2022-24726
Published
Mar 10, 2022
Updated
Apr 23, 2025
Vendor
Istio
Product
Istio
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record 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=< 1.11.8,
  2. Affected versionversion=>= 1.12.0, < 1.12.5
  3. Affected versionversion=>= 1.13.0, < 1.13.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Istio · Istioversion=< 1.11.8,; version=>= 1.12.0, < 1.12.5; version=>= 1.13.0, < 1.13.2

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHubCVSS: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-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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