Event Monitor Cyber
EM-20261109-FCR7 VulnerabilityHigh severity

esm.sh Vulnerability (CVE-2026-102657)

CVE-2026-102657

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Status
Developing

Since : signals keep joining.

First Signal
Nov 06 21:17 UTCC6 NVD CVE API 2.0
Page Born
Nov 09 22:03 UTCsecond source joined
Last Signal
Nov 09 22:03 UTC4 hours before snapshot
Sources
30 official · 3 research, news or crowd
Open For
3 daysso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 06 21:17 UTC
    C6 NVD published
  2. Scored: reached
    Nov 06 21:17 UTC
    CVSS 7.5 · EPSS 0.7%
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: not yet
    Not yet
    None in sources yet
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

Nov 712:00Nov 812:00Nov 912:00BornC6 NVD CVE API 2.0C26 GitHub Advisory DatabaseC29 CIRCL Vulnerability-Lookup

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. GHSA-g3c2-rjq2-c763 / CVE-2026-102657 (opens source in a new tab) esm.sh: web.NewHandler allows arbitrary file read via encoded dot-segment path traversal Med severityDatabaseC29 CIRCL Vulnerability-Lookup
  2. GHSA-g3c2-rjq2-c763 / CVE-2026-102657: esm.sh: web.NewHandler allows arbitrary file read via encoded dot-segment path traversal (opens source in a new tab) go:github.com/esm-dev/esm.sh/web High severityDatabaseC26 GitHub Advisory Database
  3. CVE-2026-102657 (CVSS 7.5) (opens source in a new tab) esm.sh is a no-build content delivery network (CDN) for web development. Prior to server version 137_7, the documented web.NewHandler static file server in web/handler.go joins the URL-decoded r.URL.Path with… High severityDatabaseC6 NVD CVE API 2.0