Parse Server has a login timing side-channel reveals user existence

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

GHSA-mmpq-5hcv-hf2v

BIT-parse-2026-39321

CVE-2026-39321 · Microsoft / collected KEV context

osv · GHSA-mmpq-5hcv-hf2v

• https://github.com/parse-community/parse-server/security/advisories/GHSA-mmpq-5hcv-hf2v
• https://nvd.nist.gov/vuln/detail/CVE-2026-39321
• https://github.com/parse-community/parse-server/pull/10398
• https://github.com/parse-community/parse-server/pull/10399
• https://github.com/parse-community/parse-server