Go/github.com/esm-dev/esm.sh CVE-2025-59342: medium 5.5, EPSS 3.15%

esm.sh has arbitrary file write via path traversal in `X-Zone-Id` header in github.com/esm-dev/esm.sh

Action: No fix published. Pin and monitor.

Affected

Fixed versions

No fixed version in the source.

Sources

• osv: GO-2025-3967
• nvd: CVE-2025-59342
• https://github.com/esm-dev/esm.sh/security/advisories/GHSA-g2h5-cvvr-7gmw
• https://github.com/esm-dev/esm.sh/commit/833a29f42aeb0acbd7089a71be11dd0a292d3151
• https://github.com/esm-dev/esm.sh/blob/main/server/router.go#L116
• https://github.com/esm-dev/esm.sh/blob/main/server/router.go#L411

CVE-2025-59342 · published 2025-09-24T19:21:37Z · modified 2026-03-03T04:56:55.361146Z · JSON