Vulnerability details
CVE-2026-42844
getgrav grav
Grav: Low-privileged API users can create super-admin accounts via blueprint-upload
CVSS 4.0
8.7High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| getgrav | grav | 2.0.0-beta.2 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h x_refsource_CONFIRM
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Details
- Published
- 2026-05-13
- Last updated
- 2026-05-13
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.33%
Probability of exploitation in 30 days
27.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-434Unrestricted Upload of File with Dangerous Type
- CWE-269Improper Privilege Management