Is apostrophe affected by CVE-2026-71553?

npm apostrophe is affected in <= 4.32.0.

Is CVE-2026-71553 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

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HIGHSupply chain

CVE-2026-71553

Q: Is CVE-2026-71553 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

npm · apostrophe

Summary

ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS

Advisory details

The vulnerability is a single-request persistent DoS by submitting e.g. "PATCH /api/v1/article/" with a valid editor session and body of {"toString.call":"x"}, overwriting the global toString function with value x.

Fabian

References

https://github.com/advisories/GHSA-vmg4-6gfg-83qx
https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx
https://nvd.nist.gov/vuln/detail/CVE-2026-71553
https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd

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