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Statamic allows Authenticated Control Panel users to escalate privileges via elevated session bypass

High severity GitHub Reviewed Published Feb 27, 2026 in statamic/cms • Updated Mar 2, 2026

Package

composer statamic/cms (Composer)

Affected versions

>= 6.0.0, < 6.4.0

Patched versions

6.4.0

Description

Impact

Authenticated Control Panel users may under certain conditions obtain elevated privileges without completing the intended verification step. This can allow access to sensitive operations and, depending on the user’s existing permissions, may lead to privilege escalation.

Patches

This has been fixed in 6.4.0.

References

@jasonvarga jasonvarga published to statamic/cms Feb 27, 2026
Published to the GitHub Advisory Database Feb 27, 2026
Reviewed Feb 27, 2026
Published by the National Vulnerability Database Feb 27, 2026
Last updated Mar 2, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(32nd percentile)

Weaknesses

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Learn more on MITRE.

CVE ID

CVE-2026-27939

GHSA ID

GHSA-rw9x-pxqx-q789

Source code

Credits

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