CVE-2026-112779: Grav API Plugin before 1.0.42 Cache Exhaustion and Page Permission Bypass

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-19 · updated 2026-10-20
Weakness: CWE-770

Description

Grav API plugin (grav-plugin-api) 1.0.40 before 1.0.42 caches a full translation dictionary for every well-formed language code sent to the unauthenticated GET /api/v1/translations/{lang} endpoint, and 1.0.16 before 1.0.42 fails to check target and destination page rules in the sync and batch copy endpoints. Unauthenticated attackers can send small requests that each store about 560 KB to exhaust disk or APCu, while accounts with api.pages.write can overwrite translations or create pages that page-level rules deny.

Affected products

getgrav grav-plugin-api: from 1.0.16 before 1.0.42 — fixed in 1.0.42

How to fix

Upgrade to a fixed version: getgrav grav-plugin-api 1.0.42. Check the vendor advisory for mitigations.

References

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