Is CVE-2026-27127 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-27127, but active exploitation has not been confirmed.

Can CVE-2026-27127 be exploited remotely?

Yes. CVE-2026-27127 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27127?

CVE-2026-27127 has a CVSS score of 6.3 (MEDIUM) and an EPSS exploitation probability of 0.01%.

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MEDIUMPOC

CVE-2026-27127

CWE-367Published: February 24, 2026· Updated: Feb 25, 2026

6.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.0th

Official Description

Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use (TOCTOU) vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 that allows access to all blocked IPs, not just IPv6 endpoints. Exploitation requires GraphQL schema permissions for editing assets in the `<VolumeName>` volume and creating assets in the `<VolumeName>` volume. These permissions may be granted to authenticated users with appropriate GraphQL schema access and/or Public Schema (if misconfigured with write permissions). Versions 4.16.19 and 5.8.23 patch the issue.

NVD Source

Technical Analysis

CVE-2026-27127 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.3.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2026-27127. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.