CVE-2026-123487
Parse Server before 8.6.115 and 9.0.0 before 9.10.7-alpha.1 validates user email address format…
- Risk score
- 50/100
- CVSS
- 7.5 v3.1
- Published
- 6 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 …
- Affected
- See advisory
- Fix
- Upgrade the product to 8.6.115, 9.0.0 or 9.10.7 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.5 high
- Remotely exploitable without logging in
References
Original description
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.
Last activity 6 Nov 2026. Patch Forecast updates every hour.