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CVE-2026-23644

HIGH

7.5

Description

esm.sh is a no-build content delivery network (CDN) for web development. Prior to Go pseeudoversion 0.0.0-20260116051925-c62ab83c589e, the software has a path traversal vulnerability due to an incomplete fix. `path.Clean` normalizes a path but does not prevent absolute paths in a malicious tar file. Commit https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16, corresponding to pseudoversion 0.0.0-20260116051925-c62ab83c589e, fixes this issue.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/18/2026

Last Modified2/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

esm:esm.sh

Weaknesses (CWE)

CWE-22

References

https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16(security-advisories@github.com)

https://github.com/esm-dev/esm.sh/commit/c62ab83c589e7b421a0e1376d2a00a4e48161093(security-advisories@github.com)

https://github.com/esm-dev/esm.sh/security/advisories/GHSA-2657-3c98-63jq(security-advisories@github.com)

https://pkg.go.dev/vuln/GO-2025-4138(security-advisories@github.com)

IOC Correlations

No correlations recorded

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