CVE-2026-75829: grav-plugin-api before 1.0.15 Twig SSTI via translate endpoint

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-22
Weakness: CWE-1336

Description

grav-plugin-api versions before 1.0.15 fail to validate Twig content in the translate() endpoint, allowing attackers with api.pages.write permission to persist pages with process.twig enabled. Attackers can submit crafted header and content parameters to execute server-side template injection payloads that are evaluated at render time.

Affected products

getgrav grav: before 1.0.15 — fixed in 1.0.15

How to fix

Upgrade to a fixed version: getgrav grav 1.0.15. Check the vendor advisory for mitigations.

References

https://github.com/getgrav/grav/security/advisories/GHSA-w94c-jmg4-w4c9
https://www.vulncheck.com/advisories/grav-plugin-api-before-twig-ssti-via-translate-endpoint

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