High severity8.8GHSA Advisory· Published May 12, 2026· Updated May 19, 2026
CVE-2026-42844
CVE-2026-42844
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
getgrav/gravPackagist | < 2.0.0-beta.4 | 2.0.0-beta.4 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756hnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-6xx2-m8wv-756hghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42844ghsaADVISORY
- github.com/getgrav/grav-plugin-api/commit/97fc02844a35f743dfe93d34efd92d47eedd5bc5ghsaWEB
News mentions
0No linked articles in our index yet.