CVE-2026-26069
Published: 12 February 2026
Summary
CVE-2026-26069 is a high-severity Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) vulnerability in Thecfu Scraparr. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Automated marking applies security attributes to system outputs, making it harder for attackers to exploit unmarked sensitive information leading to unauthorized exposure.
Proper attribute retention and permitted-value enforcement limits unauthorized actors from accessing sensitive information lacking correct labels.
Prevents unauthorized exposure of sensitive information by prohibiting untrusted external systems from processing or storing it.
By enforcing authorization matching prior to sharing, the control reduces the risk of exposing sensitive information to unauthorized actors.
Review and removal of nonpublic information from publicly accessible systems directly prevents exposure of sensitive data to unauthorized actors.
Data mining protection mechanisms detect and block unauthorized bulk extraction of sensitive data, directly mitigating exposure to unauthorized actors.
Literacy training teaches users to recognize and avoid actions that result in unauthorized exposure of sensitive information.
Retaining and monitoring training records confirms personnel have completed privacy and security awareness training on handling sensitive data, reducing the chance of unauthorized exposure due to lack of knowledge.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Vulnerability exposes Readarr API key via unauthenticated access to public /metrics endpoint (T1190), directly enabling credential access via insecure exposure (T1552) and theft of application access token (T1528) for subsequent Readarr abuse.
NVD Description
Scraparr is a Prometheus Exporter for various components of the *arr Suite. From 3.0.0-beta to before 3.0.2, when the Readarr integration was enabled, the exporter exposed the configured Readarr API key as the alias metric label value. Users were affected…
more
only if all of the following conditions are met, Readarr scraping feature was enabled and no alias configured, the exporter’s /metrics endpoint was accessible to external or unauthorized users, and the Readarr instance is externally accessible. If the /metrics endpoint was publicly accessible, the Readarr API key could have been disclosed via exported metrics data. This vulnerability is fixed in 3.0.2.
Deeper analysisAI
CVE-2026-26069 is an information disclosure vulnerability in Scraparr, a Prometheus exporter for components of the *arr Suite, affecting versions from 3.0.0-beta up to but not including 3.0.2. When the Readarr integration is enabled without an alias configured, the exporter exposes the configured Readarr API key directly as the value of the alias metric label in its Prometheus metrics. This issue, rated at CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) and linked to CWE-200, only impacts users who have enabled Readarr scraping and left the exporter's /metrics endpoint accessible to external or unauthorized parties.
An attacker can exploit this vulnerability by accessing the publicly exposed /metrics endpoint of the Scraparr exporter over the network with no authentication required. By scraping the metrics data, they can directly extract the Readarr API key from the alias label. If the associated Readarr instance is also externally accessible, possession of this key enables further unauthorized API access to Readarr, potentially allowing data exfiltration, configuration changes, or other administrative actions depending on the key's permissions.
The vulnerability is addressed in Scraparr version 3.0.2, as detailed in the project's security advisory (GHSA-hx24-222f-w5cj), release notes, and the fixing commit (194116bb8fb0b6ea26421b3e7a7b326973f56cd0). Security practitioners should upgrade to 3.0.2 or later, ensure /metrics endpoints are not publicly exposed, configure aliases for integrations, and review access controls for Readarr instances.
Details
- CWE(s)