Is cinny affected by CVE-2026-42553?

npm cinny is affected in <4.10.3.

Is CVE-2026-42553 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

high

CVE-2026-42553

Q: Is CVE-2026-42553 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

npm · cinny

Summary

Cinny vulnerable to access token disclosure via invalidated emoji pack avatar URL in service worker

Severity: high
EPSS: 0.3% (p22)
Also known as: GHSA-j944-w549-3453
Published: 2026-05-07

References

https://github.com/cinnyapp/cinny/security/advisories/GHSA-j944-w549-3453
https://nvd.nist.gov/vuln/detail/CVE-2026-42553
https://github.com/cinnyapp/cinny

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.