Is github.com/prometheus/prometheus affected by CVE-2026-42154?

Go github.com/prometheus/prometheus is affected in >=0.306.0 =1.0.0-rc.0 <=2.5.0.

Is CVE-2026-42154 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

high

CVE-2026-42154

Q: Is CVE-2026-42154 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

Go · github.com/prometheus/prometheus

Summary

Prometheus: Remote read endpoint allows denial of service via crafted snappy payload

Severity: high
EPSS: 0.6% (p42)
Also known as: GHSA-8rm2-7qqf-34qm, BIT-prometheus-2026-42154
Published: 2026-05-05

References

https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm
https://nvd.nist.gov/vuln/detail/CVE-2026-42154
https://github.com/prometheus/prometheus/pull/18584

Related advisories

CVE-2026-42151 — high · Go/github.com/prometheus/prometheus
CVE-2026-44903 — medium · Go/github.com/prometheus/prometheus
CVE-2026-40179 — medium · Go/github.com/prometheus/prometheus

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.