What is the CVSS score of CVE-2026-23644?

CVE-2026-23644 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.1%.

Which versions of Github are affected by CVE-2026-23644?

Organizations using esm.sh face notable risk from CVE-2026-23644, a path traversal vulnerability rated CVSS 7.5.. A patch is available.

Is there a public PoC exploit available for CVE-2026-23644?

Yes, a public proof-of-concept exploit is available for CVE-2026-23644. Prioritise patching immediately. EPSS: 0.1%.

Github CVE-2026-23644

HIGH

Path Traversal (CWE-22)

2026-01-18 security-advisories@github.com

GHSA-2657-3c98-63jq

Path Traversal Github Golang Esm.Sh Suse

7.5

CVSS 3.1

CVSS VectorNVD

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

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

DescriptionNVD

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. …

RemediationAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. Review file handling controls and restrict upload directories.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-23644 vulnerability details – vuln.today

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Github CVE-2026-23644

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code