CVE-2026-123487: Parse Server before 8.6.115 and 9.0.0 before 9.10.7-alpha.1 validates user email address format with a regular expressio…
Parse Server before 8.6.115 and 9.0.0 before 9.10.7-alpha.1 validates user email address format with a regular expression whose run time grows quadratically with input length and that is applied without a length limit. An unauthenticated attacker who knows the application ID can send a sign-up request, or a logged-in user can update their own email, with a long crafted email address to block the Node.js event loop and deny service to all clients.
- Published by source
- 2026-11-06
- First seen by Reality Radar
- 2026-11-06
- Last verified
- 2026-11-06
What the official notice says
Risk: CVSS 8.7
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Sources
- NIST National Vulnerability Database Tier A · official published 2026-11-06
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #4405 | new | 2026-11-06 | 4a072d33c5aa…06f9e4 | 5df92e4802a7…acd0a7 |
Chain head: #4420 c6bb6b5e2446…942fa3