Is apostrophe affected by CVE-2026-35569?

npm apostrophe is affected in <4.29.0.

Is CVE-2026-35569 being exploited?

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

high

CVE-2026-35569

Q: Is CVE-2026-35569 being exploited?

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

npm · apostrophe

Summary

Stored XSS in SEO Fields Leads to Authenticated API Data Exposure in ApostropheCMS

Severity: high
EPSS: 0.3% (p21)
Also known as: GHSA-855c-r2vq-c292
Published: 2026-04-16

References

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-855c-r2vq-c292
https://nvd.nist.gov/vuln/detail/CVE-2026-35569
https://github.com/apostrophecms/apostrophe/commit/0e57dd07a56ae1ba1e3af646ba026db4d0ab5bb3

Related advisories

CVE-2026-45013 — high · npm/apostrophe
CVE-2026-45012 — high · npm/apostrophe
CVE-2026-39857 — medium · npm/apostrophe
CVE-2026-33889 — medium · npm/apostrophe
CVE-2026-33888 — medium · npm/apostrophe

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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.