{"id":"CVE-2026-129360","kind":"vulnerability","aliases":["CVE-2026-129360"],"related":[],"title":"Linux Foundation Magma: forged client certificate header bypasses REST API authentication","description":"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.","summary":"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.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"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"],"how_to_check":"- Check the Magma Orc8r version; the CVE lists versions up to and including 1.9.0. No fixed version is published.\n- Check whether the Obsidian REST API (orc8r controller) is reachable by any route that skips the Orc8r proxy that terminates client-certificate TLS.\n- 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.","fix":null,"status":"open","published_at":"2026-11-15T04:16:45+00:00","first_seen_at":"2026-11-15T04:34:06+00:00","triaged_at":"2026-11-15T04:35:00+00:00","updated_at":"2026-11-15T04:36:04+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-15T04:35:00Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Linux Foundation Magma: forged client certificate header bypasses REST API authentication","impact":"high","summary":"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.","audience":"businesses","category":"other","nicknames":[],"who_cares":["magma","self-hosted","telecom"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"remote attacker bypasses authentication and acts as another identity","analyst_note":"Confirm the fixed version and whether a proxy or default config matters; the vendor did not respond to disclosure, so check the Magma repository and NVD for a patch.","how_to_check":"- Check the installed Magma version; affected versions are up to and including `1.9.0`.\n- Look at whether the Obsidian REST API is reachable from untrusted networks.\n- Check whether a reverse proxy forwards or sets the X-Magma-Client-Cert-Serial header.","plain_action":"","product_name":"Magma","needs_analyst":true,"not_affected_if":["default-config"],"who_is_affected":"Teams that run Magma (the open-source mobile network core) with the Obsidian REST API exposed. The flaw relies on trusting a request header that the client controls, so deployments where the API is only reachable through a proxy that strips or overwrites that header are less exposed. unknown whether any specific configuration is required beyond that.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000755,"input_tokens":4598,"output_tokens":591,"severity_before":"high"},"analyst_status":"done","analyst_note":"Confirm the fixed version and whether a proxy or default config matters; the vendor did not respond to disclosure, so check the Magma repository and NVD for a patch.","search":"'-129360':14A,17A '-2026':13A,16A '1.9.0':29B,67C 'api':10A 'argument':89C 'attack':33B,104C 'authent':11A,55B,99C 'bypass':8A,54B,100C 'cert':40B,94C 'certif':6A 'client':5A,39B,93C 'compon':47B,81C 'contact':112C 'cve':12A,15A 'disclosur':116C 'earli':113C 'element':70C 'execut':84C 'file':77C 'forg':4A 'foundat':2A,63C 'function':74C 'header':7A,42B 'host':24B 'ident':52B 'identifi':60C 'impact':69C 'launch':107C 'lead':97C 'let':30B 'linux':1A,62C 'magma':3A,18A,19B,26B,38B,64C,92C 'manipul':34B,86C 'obsidian':45B,82C 'orc8r':20B 'orc8r/cloud/go/services/obsidian/access/operator.go':78C 'remot':32B,108C 'respond':120C 'rest':9A,46B,83C 'self':23B 'self-host':22B 'serial':41B,95C 'spoof':50B,102C 'telecom':25B 'unknown':73C 'vendor':110C 'way':123C 'weak':57C 'x':37B,91C 'x-magma-client-cert-seri':36B,90C","nicknames":[],"mitigations":[],"who_affected":"Teams that run Magma Orchestrator (orc8r) up to 1.9.0 with the Obsidian REST API reachable by untrusted clients. The code takes the client certificate serial from a request header and looks it up in Certifier, so it is only safe when a trusted proxy sets that header from the real TLS client certificate. Deployments where the API is reachable only through such a proxy, or only from a private network, are less exposed. The sources do not say whether the attacker needs to know a valid operator serial. No vendor advisory or patch exists yet.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":["magma"],"ptokens":["magma"],"labels":["high","magma","orc8r","other","selfhosted","telecom","vendor"],"campaign_type":null,"search_a":"'-129360':14A,17A '-2026':13A,16A 'api':10A 'authent':11A 'bypass':8A 'certif':6A 'client':5A 'cve':12A,15A 'forg':4A 'foundat':2A 'header':7A 'linux':1A 'magma':3A,18A 'rest':9A","search_b":"'1.9.0':29B 'attack':33B 'authent':55B 'bypass':54B 'cert':40B 'client':39B 'compon':47B 'header':42B 'host':24B 'ident':52B 'let':30B 'magma':19B,26B,38B 'manipul':34B 'obsidian':45B 'orc8r':20B 'remot':32B 'rest':46B 'self':23B 'self-host':22B 'serial':41B 'spoof':50B 'telecom':25B 'x':37B 'x-magma-client-cert-seri':36B","search_c":"'1.9.0':67C 'argument':89C 'attack':104C 'authent':99C 'bypass':100C 'cert':94C 'client':93C 'compon':81C 'contact':112C 'disclosur':116C 'earli':113C 'element':70C 'execut':84C 'file':77C 'foundat':63C 'function':74C 'identifi':60C 'impact':69C 'launch':107C 'lead':97C 'linux':62C 'magma':64C,92C 'manipul':86C 'obsidian':82C 'orc8r/cloud/go/services/obsidian/access/operator.go':78C 'remot':108C 'respond':120C 'rest':83C 'serial':95C 'spoof':102C 'unknown':73C 'vendor':110C 'way':123C 'weak':57C 'x':91C 'x-magma-client-cert-seri':90C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-15T04:16:45+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"cna@vuldb.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-129360","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-129360","severity":null,"published_at":"2026-11-15T04:16:45+00:00","modified_at":"2026-11-15T04:16:45+00:00","first_seen_at":"2026-11-15T04:34:06+00:00","fetched_at":"2026-11-15T04:34:06+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-129360:4021","url":"https://vuldb.com/vuln/437423","severity":null,"published_at":"2026-11-15T04:36:04+00:00","modified_at":"2026-11-15T04:36:04+00:00","first_seen_at":"2026-11-15T04:36:04+00:00","fetched_at":"2026-11-15T04:36:04+00:00","note":"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.","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"]}],"documents":[{"id":160790,"url":"https://vuldb.com/vuln/437423","title":"VDB-437423 Magma Obsidian REST operator.go X-Magma-Client-Cert-Serial spoofing","kind":"advisory","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"describes","confidence":null,"note":null},{"id":160791,"url":"https://raw.githubusercontent.com/magma/magma/master/orc8r/cloud/go/services/obsidian/access/operator.go","title":"magma operator.go (master): getOperator reads client cert SN header","kind":"other","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"mentions","confidence":null,"note":null},{"id":160792,"url":"https://magma.github.io/magma/docs/orc8r/dev_security","title":"Magma docs: Orc8r security (TLS terminated at Orc8r proxy)","kind":"vendor","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"mentions","confidence":null,"note":null}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}