CVE-2026-75827

CVSS 9.3 (critical) · published 2026-08-18

Grav before 2.0.15 contains an arbitrary file write vulnerability in the Blueprint dynamic-data bare-function validation that uses an incomplete denylist instead of a positive allowlist. Attackers with page-edit or blueprint-config access can invoke the error_log function through a data directive to append PHP payloads to web-accessible files, achieving remote code execution.

Weakness: CWE-94

Source: NVD CVE-2026-75827

References

• https://github.com/getgrav/grav/security/advisories/GHSA-f8wv-xp27-6gq7
• https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-error-log
• https://github.com/getgrav/grav/security/advisories/GHSA-f8wv-xp27-6gq7

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