CVE-2026-23644

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

January 18, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Aug 2, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic

GO-2025-4138 - Go Packages

https://pkg.go.dev/vuln/GO-2025-4138
github Patch Available🟡 PoC Available

Path traversal in `extractPackageTarball` enables file writes from malicious packages · Advisory · esm-dev/esm.sh · GitHub

https://github.com/esm-dev/esm.sh/security/advisories/GHSA-2657-3c98-63jq
github_commit Patch Available

commit c62ab83c589e (esm-dev/esm.sh)

Patch available: esm-dev/esm.sh v137 (contains commit c62ab83c589e)

https://github.com/esm-dev/esm.sh/commit/c62ab83c589e7b421a0e1376d2a00a4e48161093
github_commit Patch Available

commit 9d77b88c3207 (esm-dev/esm.sh)

Patch available: esm-dev/esm.sh v137 (contains commit 9d77b88c3207)

https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/esm-dev/esm.sh—0.0.0-20260116051925-c62ab83c589e—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 160 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-19 03:00 UTCOSV refresh
  3. 2026-09-18 19:27 UTCEPSS rescore
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  18. 2026-08-31 06:25 UTCOSV refresh
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  1. 2026-08-21 23:49 UTCEPSS rescore
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  6. 2026-08-16 14:56 UTCEPSS rescore
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  9. 2026-08-14 13:47 UTCEG score recompute
  10. 2026-08-13 22:00 UTCEPSS rescore
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  14. 2026-08-09 19:23 UTCEG score recompute
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  24. 2026-08-02 23:04 UTCEG score recompute
  25. 2026-08-02 02:26 UTCEPSS rescore
  26. 2026-08-01 04:15 UTCEPSS rescore
  27. 2026-07-30 01:30 UTCEPSS rescore
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  36. 2026-07-23 09:49 UTCOSV refresh
  37. 2026-07-23 03:07 UTCEG score recompute
  38. 2026-07-22 14:08 UTCEPSS rescore
  39. 2026-07-21 15:24 UTCEPSS rescore
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  41. 2026-07-20 17:08 UTCEPSS rescore
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  44. 2026-07-19 02:29 UTCEPSS rescore
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  63. 2026-07-07 13:46 UTCEPSS rescore
  64. 2026-07-06 16:27 UTCEPSS rescore
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  66. 2026-07-06 05:02 UTCOSV refresh
  67. 2026-07-06 02:23 UTCEPSS rescore
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  72. 2026-07-01 15:06 UTCEPSS rescore
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  74. 2026-06-30 23:22 UTCEPSS rescore
  75. 2026-06-30 23:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-23644?
CVE-2026-23644 is a high vulnerability published on January 18, 2026. 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.…
When was CVE-2026-23644 disclosed?
CVE-2026-23644 was first published in the National Vulnerability Database on January 18, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23644 actively exploited?
CVE-2026-23644 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.3% of all scored CVEs.
What is the CVSS score of CVE-2026-23644?
CVE-2026-23644 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-23644?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23644, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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