CVE-2026-27127Public exploitNetwork attack vector

Cloud metadata disclosure via DNS rebinding

Published Feb 24, 2026 · Updated Feb 24, 2026

SSRF in Craft CMS 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22 allows attackers to read internal resources via DNS rebinding. The GraphQL Asset resolver validates one DNS answer before Guzzle resolves the same hostname again, allowing an attacker-controlled DNS server to substitute a blocked address for the request. Exploitation requires asset-create and asset-edit GraphQL permissions through authenticated schema access or a publicly writable schema and can disclose cloud instance metadata and credentials.

CVSS severity7.0
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Craft CMS 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22 allows attackers to read internal resources via DNS rebinding. The GraphQL Asset resolver validates one DNS answer before Guzzle resolves the same hostname again, allowing an attacker-controlled DNS server to substitute a blocked address for the request. Exploitation requires asset-create and asset-edit GraphQL permissions through authenticated schema access or a publicly writable schema and can disclose cloud instance metadata and credentials.

The record

CVE
CVE-2026-27127
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
Pixel & Tonic
Product
Craft CMS
Classifications
CWE-367, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 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=>= 4.5.0-RC1, < 4.16.19
  2. Affected versionversion=>= 5.0.0-RC1, < 5.8.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pixel & Tonic · Craft CMSversion=>= 4.5.0-RC1, < 4.16.19; version=>= 5.0.0-RC1, < 5.8.23

Published CVSS scores

7.0GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
6.3NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1552.005Cloud Instance Metadata API

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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