CVE-2026-11244Network attack vector

SSRF via unrestricted WebAuthn challenge URL fetch

Published Jun 4, 2026 · Updated Jun 4, 2026

SSRF in Google Chrome before 149.0.7827.53 allows remote attackers with a compromised renderer to reach internal services via WebAuthn. ChallengeUrlFetcher uses a privileged browser-process URL loader for an attacker-supplied challenge_url without enforcing scheme, origin, or PNA restrictions. Exploitation requires crafted-page interaction after renderer compromise; it enables blind GET requests and a timing oracle, not general response-body disclosure.

CVSS severity3.1
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SSRF in Google Chrome before 149.0.7827.53 allows remote attackers with a compromised renderer to reach internal services via WebAuthn. ChallengeUrlFetcher uses a privileged browser-process URL loader for an attacker-supplied challenge_url without enforcing scheme, origin, or PNA restrictions. Exploitation requires crafted-page interaction after renderer compromise; it enables blind GET requests and a timing oracle, not general response-body disclosure.

The record

CVE
CVE-2026-11244
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-20, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=149.0.7827.53 <149.0.7827.53

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=149.0.7827.53 <149.0.7827.53

Published CVSS scores

3.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

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-20Improper Input Validation
T1046Network Service Discovery

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo