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CVE-2026-75827

CriticalCVSS 9.3 / 10
Published Aug 18, 2026·Last modified Aug 19, 2026
Affected Components(139)
getgrav/grav
1.7.0-rc.9
getgrav/grav
1.7.26
getgrav/grav
1.7.26.1
1 / 47
Description

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.

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Risk Scores
Base Score
9.3

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
8.9

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.78%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Proof of Concept

A proof of concept is available for this vulnerability (1 exploit found).

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