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CVE-2026-44594

esm.sh is a no-build content delivery network (CDN) for web development. In 137 and earlier, a Local File Inclusion (LFI) vulnerability exists in the esbuild plugin's handling of the browser field in package.json. An attacker can publish an npm package that causes the server to read and return arbitrary files from the host filesystem during the build process.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:448f6e3e4a9283b6780a208a4e91b9f6557e54ee15d1a4c8356bb450389ce56c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"esm.sh","vendor":"esm-dev","versions":[{"status":"affected","version":"<= 137"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1e6d7850b04c661989f73de5ad16a0022e9a90d439f7d9371c9e35929148ce0f · sha256:291ee7543bbf96ba… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1e6d7850b04c661989f73de5ad16a0022e9a90d439f7d9371c9e35929148ce0f · sha256:291ee7543bbf96ba… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1e6d7850b04c661989f73de5ad16a0022e9a90d439f7d9371c9e35929148ce0f · sha256:291ee7543bbf96ba… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1e6d7850b04c661989f73de5ad16a0022e9a90d439f7d9371c9e35929148ce0f · sha256:291ee7543bbf96ba… · /containers/adp/0/references/0
{"name":"https://github.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57","tags":["x_refsource_CONFIRM"],"url":"https://github.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1e6d7850b04c661989f73de5ad16a0022e9a90d439f7d9371c9e35929148ce0f · sha256:291ee7543bbf96ba… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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