---
id: "CVE-2026-129360"
page: "https://infrastack.ai/live/CVE-2026-129360"
kind: "vulnerability"
aliases: ["CVE-2026-129360"]
title: "Linux Foundation Magma: forged client certificate header bypasses REST API authentication"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Magma", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["magma", "orc8r", "other", "self-hosted", "telecom"]
not_affected_if: ["auth-required", "default-config", "private-network"]
published_at: "2026-11-15T04:16:45+00:00"
first_seen_at: "2026-11-15T04:34:06+00:00"
updated_at: "2026-11-15T04:36:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-129360", "first_seen_at": "2026-11-15T04:34:06+00:00"}, {"source": "analyst", "url": "https://vuldb.com/vuln/437423", "first_seen_at": "2026-11-15T04:36:04+00:00", "cites": ["https://vuldb.com/vuln/437423", "https://raw.githubusercontent.com/magma/magma/master/orc8r/cloud/go/services/obsidian/access/operator.go", "https://magma.github.io/magma/docs/orc8r/dev_security"]}]
exploit_sources: []
---

# Linux Foundation Magma: forged client certificate header bypasses REST API authentication

Link for people: https://infrastack.ai/live/CVE-2026-129360 (this .md is for agents)

Magma up to 1.9.0 lets a remote attacker manipulate the X-Magma-Client-Cert-Serial header in the Obsidian REST component. This can spoof an identity and bypass authentication.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Magma affected range not listed fixed no fixed version listed

## How to check

- Check the Magma Orc8r version; the CVE lists versions up to and including 1.9.0. No fixed version is published.
- Check whether the Obsidian REST API (orc8r controller) is reachable by any route that skips the Orc8r proxy that terminates client-certificate TLS.
- Check that the proxy overwrites or strips any client-supplied X-Magma-Client-Cert-Serial header. The code reads the header and looks up that serial in Certifier, so a client that can send it directly can name a serial of its choice.

## Timeline

- 2026-11-15T04:34:06+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-129360
- 2026-11-15T04:36:04+00:00 analyst https://vuldb.com/vuln/437423 — No vendor advisory or fix found; vendor did not respond per VulDB/CVE. Master operator.go getOperator trusts the X-Magma-Client-Cert-Serial header and looks up that serial in Certifier; header is meant to be set by the Orc8r proxy after TLS termination. Nothing verified. Public CVSS 4.0 is 6.9 medium; severity left unchanged.

## Documents

- [describes] VDB-437423 Magma Obsidian REST operator.go X-Magma-Client-Cert-Serial spoofing https://vuldb.com/vuln/437423
- [mentions] magma operator.go (master): getOperator reads client cert SN header https://raw.githubusercontent.com/magma/magma/master/orc8r/cloud/go/services/obsidian/access/operator.go
- [mentions] Magma docs: Orc8r security (TLS terminated at Orc8r proxy) https://magma.github.io/magma/docs/orc8r/dev_security

## From the sources

A weakness has been identified in Linux Foundation Magma up to 1.9.0. The impacted element is an unknown function of the file orc8r/cloud/go/services/obsidian/access/operator.go of the component Obsidian REST. Executing a manipulation of the argument X-Magma-Client-Cert-Serial can lead to authentication bypass by spoofing. The attack can be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_