Is github.com/esm-dev/esm.sh affected by CVE-2026-27730?

Go github.com/esm-dev/esm.sh is affected in <0.0.0-20250616164159-0593516c4cfa.

Is CVE-2026-27730 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

medium

CVE-2026-27730

Q: Is CVE-2026-27730 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

Go · github.com/esm-dev/esm.sh

Summary

esm.sh has SSRF localhost/private-network bypass in `/http(s)` module route in github.com/esm-dev/esm.sh

Severity: medium
EPSS: 0.3% (p26)
Also known as: GHSA-p2v6-84h2-5x4r, GO-2026-4554
Published: 2026-02-27

References

https://github.com/esm-dev/esm.sh/security/advisories/GHSA-p2v6-84h2-5x4r
https://nvd.nist.gov/vuln/detail/CVE-2026-27730
https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0

Related advisories

CVE-2026-44594 — high · Go/github.com/esm-dev/esm.sh
CVE-2026-44593 — high · Go/github.com/esm-dev/esm.sh
CVE-2026-23644 — medium · Go/github.com/esm-dev/esm.sh
CVE-2025-50180 — medium · Go/github.com/esm-dev/esm.sh

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Check my repo

Summarize with AI

ChatGPT Claude Perplexity

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.