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CVE-2026-42844

8.7 high SSVC exploitation: poc Analyzed
NVD · CVE.org

Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write can abuse /api/v1/blueprint-upload to write an arbitrary YAML file into user/accounts/, then log in as the newly created account with api.super privileges. This results in full administrative compromise of the Grav API. This vulnerability is fixed in API 1.0.0-beta.17.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.7 · getgravNVD modified 2026-10-26 14:10

Affected (CPE criteria) 1

  • cpe:2.3:a:getgrav:grav:2.0.0:beta2:*:*:*:*:*:*

References 2