CVE-2026-75827

critical · 9.3

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.

9.3

CVSS

0.9%

EPSS (exploit prob.)

58th

EPSS percentile

2026-08-18

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-94

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-75827