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Cyber Daily reports that malicious actors are exploiting CVE-2026-64849 in MLflow, an open-source platform used to build and manage AI models, agents, and large language model applications. The vulnerability affects versions before 3.15.0 and has been fixed in that release.
Cyber Daily reports that attackers are targeting CVE-2026-64849, a critical unauthenticated server-side request forgery vulnerability in MLflow. The outlet says the vulnerability was disclosed on 2 August and formally assigned a CVE identifier on 17 August. Cyber Daily reports that exploitation began within hours of disclosure, but the source does not independently document a specific victim, successful breach, stolen credential, or confirmed compromise. The report therefore separates the existence of a fix from evidence about the results of any individual attack. It describes reported targeting activity, but does not identify a confirmed victim or quantify the effect of those attempts.
According to Cyber Daily, the flaw exists in MLflow versions before 3.15.0 and involves the model-registry webhook testing function. The article says MLflow validates the original webhook URL but then follows redirects and resolves the destination again without pinning the validated address. Cyber Daily reports that this behavior can allow an attacker to reach internal services or cloud metadata endpoints and receive response status and response body information. The outlet says the issue is fixed in MLflow 3.15.0. In the report's description, the important sequence is the gap between checking the submitted address and handling the redirected destination. That sequence is presented as the route by which a request intended for an external webhook could be redirected toward a more sensitive location.
Cyber Daily quotes Yordan Ganchev, a principal threat intelligence specialist at watchTowr, who says the flaw can proxy requests through an affected MLflow system and interact with internal services. Ganchev told the outlet that global honeypot telemetry showed attackers targeting cloud-hosted MLflow systems in attempts to extract credentials and secrets from known internal IP addresses and services. The source provides no technical telemetry, victim list, incident count, or independent confirmation from MLflow operators. The account consequently describes both an application-level weakness and a potential route to information held elsewhere in the environment. It does not say that every vulnerable installation exposes the same services or that every attempted request returned useful secrets.
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Por qué es importante
The reported flaw could let attackers use an exposed MLflow instance to reach internal services or cloud metadata endpoints. Cyber Daily quotes security specialists who warn that stolen cloud credentials could enable broader access, although the article does not establish how many systems were compromised or whether credentials were successfully taken.
Cyber Daily presents the issue as significant because MLflow is used in AI and machine-learning environments that may span development, research, engineering, and production. The outlet cites MLflow's website as saying that thousands of organizations use the platform, including Meta, Accenture, and Microsoft. That usage claim is not independently verified in the source, and Cyber Daily does not say that any of those companies were affected or targeted. The examples are included to show the breadth of the platform's reported use, not to establish that those named organizations deployed a vulnerable or exposed instance. The article supplies no organization-specific incident evidence.
The practical risk described by Cyber Daily is that an exposed MLflow server could become a bridge into services that should not be publicly reachable. The outlet quotes Robbie Mueller of security-governance firm ArmorCode, who cautions that download counts cannot determine exposure and that organizations may not know which MLflow systems are internet accessible. This makes accurate asset inventories and visibility into cloud deployments important parts of assessing the risk described in the report. The risk assessment consequently depends on facts that vary by deployment, including whether the service is exposed and what it can reach. Cyber Daily's discussion does not supply those facts for a particular organization.
Cyber Daily reports Mueller's warning that access to an overly privileged cloud identity could expand an initial MLflow compromise into a wider incident. Possible consequences listed in the article include access to sensitive data, secrets, storage, additional workloads, and cloud-management APIs, followed by data exfiltration or lateral movement. These are reported worst-case possibilities, not confirmed outcomes. The source does not establish that the vulnerability has produced any of them. The article frames these consequences as conditional on the permissions and connectivity available to the compromised environment. That conditional framing is important because the report provides no evidence that any listed consequence occurred.
Qué ver a continuación
Organizations using MLflow should prioritize upgrading to version 3.15.0, identify internet-accessible instances, review logs for suspicious webhook activity, and investigate possible exposure of credentials and secrets. Cyber Daily also highlights asset inventory, least-privilege controls, and compensating protections for systems that cannot be patched immediately.
Cyber Daily urges organizations using MLflow to prioritize patching and investigate possible credential theft. The specific remediation reported by the outlet is upgrading systems to MLflow 3.15.0, which the CVE listing identifies as the version containing the fix. The article does not explain whether upgrading alone removes all persistence or exposure created before patching, so organizations would still need to assess logs and credentials according to their own incident-response procedures. The recommended sequence is therefore both corrective and investigative: remove the vulnerable version, then determine whether the system or its accessible credentials require additional response. Cyber Daily leaves the exact review period and escalation threshold to the organization.
The report says defenders should determine whether MLflow instances are reachable from the internet and whether webhook endpoints received unusual requests or followed unexpected redirects. Cyber Daily does not provide a detection rule, log format, indicator list, or confirmed attack signature. It also does not identify the cloud providers, regions, organizations, or internal services allegedly targeted, leaving the operational scope of the reported activity unclear. Those gaps limit what can be inferred from the report about the scale or repeatability of the activity. They also mean that the absence of a published indicator list is not evidence that a deployment was untouched.
For systems that cannot be patched immediately, Cyber Daily quotes Mueller recommending compensating controls, exposure-management practices, and least-privilege principles. In practical terms within the article's framing, that means limiting unnecessary network access, reducing the permissions available to MLflow's cloud identity, and ensuring that credentials or secrets reachable from the environment are reviewed. The source does not confirm which mitigations have been tested against this vulnerability or how effective they are in particular deployments. These measures are presented as risk-reduction steps while patching remains incomplete, not as a substitute for the fixed release or for investigation where exposure is suspected. The source does not rank them or prescribe a single deployment design.
The main unresolved questions are how widespread active exploitation is, whether attackers obtained valid credentials, how many internet-facing MLflow installations are vulnerable, and whether any organization has confirmed a breach. Cyber Daily reports that the U.S. Cybersecurity and Infrastructure Security Agency warned federal agencies to address the issue, but the article does not reproduce the warning or provide a direct statement from CISA, MLflow, or an affected organization. Further reporting should establish those points before the incident's impact is quantified. Until those questions are answered, the report supports treating the issue as an active security concern while keeping conclusions about damage and attribution limited to what is documented. It does not provide a basis for assigning responsibility to a specific actor.
