CVE-2026-75889
HIGHDescription
Grafana Alloy’s prometheus.operator.servicemonitors component allows a user who can create or modify ServiceMonitor resources in a watched namespace to specify an arbitrary local file through bearerTokenFile. Alloy reads the file and sends its contents as a bearer token to an attacker-controlled scrape endpoint. This may disclose files accessible to the Alloy process, including its projected Kubernetes service account token, potentially granting the attacker Alloy’s Kubernetes permissions. Exploitation requires ServiceMonitor write access and lower privileges than Alloy’s service account.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 12% of all known CVEs.
References
Related Vulnerabilities
Other CWE-552 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-17519 | High | 7.5 | 98% | KEV | Fix |
| CVE-2025-11371 | High | 7.5 | 92% | KEV | Fix |
| CVE-2023-50164 | Critical | 9.8 | 81% | - | Fix |
| CVE-2016-3715 | Medium | 5.5 | 75% | KEV | Fix |
| CVE-2020-15175 | High | 7.4 | 72% | - | Fix |
| CVE-2021-39316 | High | 7.5 | 66% | - | - |
Common questions
How do I fix CVE-2026-75889?
No published fix for CVE-2026-75889 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-75889 being actively exploited?
Not that we know of. CVE-2026-75889 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.22% is the estimated probability that it will be exploited in the next 30 days. That is higher than 12% of all scored CVEs.
How severe is CVE-2026-75889?
CVE-2026-75889 has a CVSS v3 base score of 7.7, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-31.