[UPDATE] [medium] Prometheus: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in Prometheus to conduct a denial of service attack, disclose confidential information, or perform cross-site scripting attacks.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to conduct a denial of service attack, disclose confidential information, or perform cross-site scripting attacks.
- Who is affected
- Deployments of Prometheus are affected.
- Urgency
- Remediation is medium urgency due to the variety of potential impacts including denial of service and information disclosure.
- Action
- Update to the latest version of Prometheus.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1292
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-449030.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all scored CVEs.
- Low exploitation riskCVE-2026-421510.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.
- Low exploitation riskCVE-2026-421540.76% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-44903 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42151 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42154 | coverage & exploitation status | NVD · CVE.org |
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