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Golang CVE-2026-23644

HIGH
Path Traversal (CWE-22)
2026-01-18 security-advisories@github.com GHSA-2657-3c98-63jq
7.5
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SUSE
HIGH
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 18, 2026 - 16:10 vuln.today
Public exploit code
Patch released
Feb 18, 2026 - 16:10 nvd
Patch available
CVE Published
Jan 18, 2026 - 23:15 nvd
HIGH 7.5

DescriptionGitHub Advisory

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.

AnalysisAI

Path traversal in esm.sh CDN prior to version 0.0.0-20260116051925-c62ab83c589e allows unauthenticated remote attackers to write arbitrary files to the server through malicious tar archives, bypassing incomplete path sanitization. Public exploit code exists for this vulnerability. The issue stems from improper validation of absolute paths in tar file entries, enabling potential code execution or service disruption on affected systems.

Technical ContextAI

Classified as CWE-22 (Path Traversal). Affects Esm.Sh. 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.

RemediationAI

A vendor patch is available — apply it immediately. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Leap 15.6 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP5 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6 Fixed
openSUSE Leap 15.5 Fixed

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CVE-2026-23644 vulnerability details – vuln.today

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