Low 2.1Published May 12, 2026

CVE-2026-43930Parse Server: MFA SMS one-time password accepted twice under concurrent login

Updated under an hour ago (Oct 27, 2026, 11:20 AM ET)

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It affects parse-community parse-server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for parse-community parse-server

Exploited in the last 30 days

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.76 and 9.9.0-alpha.2, a race condition in the MFA SMS one-time password (OTP) login path allows two concurrent /login requests carrying the same OTP to both succeed and both receive valid session tokens, breaking the single-use property of the OTP. The vulnerability requires the attacker to already possess the victim's password and intercept the active SMS OTP (e.g. via SIM swap, network mirror, or phishing relay) and to race the legitimate login request, so the practical attack surface is narrow. This vulnerability is fixed in 8.6.76 and 9.9.0-alpha.2.

CVSS: 2.1 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: May 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

parse-community parse-server parse_community:parse_server (from the name)	from 9.0.0, < 9.9.0-alpha.2; before 8.6.76	CNA record
parseplatform parse-server parseplatform:parse-server	before 8.6.76; from 9.0.0 before 9.9.0; 9.9.0	NVD

References

References

https://github.com/parse-community/parse-server/security/advisories/GHSA-jpq4-7fmq-q5fj	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/parse-community/parse-server/pull/10448	x-refsource-misc, issue-tracking, patch
https://github.com/parse-community/parse-server/pull/10449	x-refsource-misc, issue-tracking, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.