{"id":"CVE-2026-42602","sourceIdentifier":"security-advisories@github.com","published":"2026-05-13T21:16:47.210","lastModified":"2026-10-26T14:10:00.130","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"azureauthextension is the Azure Authenticator Extension. From 0.124.0 to 0.150.0, a server-side authentication bypass in azureauthextension allows any party who holds a single valid Azure access token for any scope the collector's configured identity can mint for to authenticate to any OpenTelemetry receiver that uses auth: azure_auth. The extension's Authenticate method does not validate incoming bearer tokens as JWTs. Instead, it calls its own configured credential to obtain an access token and compares the client's token to the result with string equality — and the scope for that server-side token request is taken from the client-supplied Host header. As a result, a token minted for any Azure resource the service principal has ever been issued a token for (ARM, Graph, Key Vault, Storage, etc.) will authenticate to the collector if the attacker picks a matching Host. Tokens are replayable for the full issued lifetime (commonly several hours for managed identity tokens)."},{"lang":"es","value":"azureauthextension es la Extensión de Autenticador de Azure. De 0.124.0 a 0.150.0, una omisión de autenticación del lado del servidor en azureauthextension permite a cualquier parte que posea un único token de acceso de Azure válido para cualquier ámbito que la identidad configurada del colector pueda acuñar autenticarse en cualquier receptor de OpenTelemetry que utilice auth: azure_auth. El método Authenticate de la extensión no valida los tokens de portador entrantes como JWT. En su lugar, llama a su propia credencial configurada para obtener un token de acceso y compara el token del cliente con el resultado mediante igualdad de cadenas - y el ámbito para esa solicitud de token del lado del servidor se toma del encabezado Host proporcionado por el cliente. Como resultado, un token acuñado para cualquier recurso de Azure para el que se le haya emitido un token al principal de servicio (ARM, Graph, Key Vault, Storage, etc.) se autenticará en el colector si el atacante elige un Host coincidente. Los tokens son rejugables durante toda su vida útil emitida (comúnmente varias horas para tokens de identidad administrada)."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"open-telemetry","product":"opentelemetry-collector-contrib","versions":[{"version":">= 0.124.0, <= 0.150.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-14T12:51:31.756562Z","id":"CVE-2026-42602","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-208"},{"lang":"en","value":"CWE-287"},{"lang":"en","value":"CWE-290"},{"lang":"en","value":"CWE-294"},{"lang":"en","value":"CWE-347"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:opentelemetry:opentelemetry_collector_contrib:*:*:*:*:*:go:*:*","versionStartIncluding":"0.124.0","versionEndIncluding":"0.150.0","matchCriteriaId":"DAF35C18-82FD-4D93-8424-E59866D90769"}]}]}],"references":[{"url":"https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-pjv4-3c63-699f","source":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-pjv4-3c63-699f","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Mitigation","Vendor Advisory"]}]}