cve.bz

CVE-2026-23644

7.7 highEPSS 0.6%

High (7.7) in esm esm.sh. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in github.com/esm-dev/esm.sh 0.0.0-20260116051925-c62ab83c589e.

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.

Severity

CVSS 4.0

7.7 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
CWE
CWE-22
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-2657-3c98-63jqGogithub.com/esm-dev/esm.sh>=0.0.1 <=136no fix published
GHSA-2657-3c98-63jqGogithub.com/esm-dev/esm.sh<0.0.0-20260116051925-c62ab83c589e0.0.0-20260116051925-c62ab83c589e
GO-2026-4332Gogithub.com/esm-dev/esm.sh<0.0.0-20260116051925-c62ab83c589e0.0.0-20260116051925-c62ab83c589e

References

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