CVE-2026-34224
published 2026-03-31CVE-2026-34224: Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.64 and 9.7.0-alpha.8, an attacker…
PriorityP425medium4.4CVSS 3.1
AVNACHPRHUINSUCNIHAN
EPSS
0.31%
22.8th percentile
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.64 and 9.7.0-alpha.8, an attacker who possesses a valid authentication provider token and a single MFA recovery code or SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions. This issue has been patched in versions 8.6.64 and 9.7.0-alpha.8.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| parse-community | parse-server | < 8.6.64 | 8.6.64 |
| parse-community | parse-server | — | — |
| parse-community | parse-server | >= 0 < 8.6.64 | 8.6.64 |
| parse-community | parse-server | >= 9.0.0 < 9.7.0-alpha.8 | 9.7.0-alpha.8 |
| parseplatform | parse-server | < 8.6.64 | 8.6.64 |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | >= 9.0.0 < 9.7.0 | 9.7.0 |
CVSS provenance
nvdv3.14.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
nvdv4.02.1LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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GHSA
Parse Server has an MFA single-use token bypass via concurrent authData login requests
ghsa·2026-03-29
CVE-2026-34224 [LOW] CWE-367 Parse Server has an MFA single-use token bypass via concurrent authData login requests
Parse Server has an MFA single-use token bypass via concurrent authData login requests
### Impact
An attacker who possesses a valid authentication provider token and a single MFA recovery code or SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions.
### Patches
The fix adds optimistic locking to the authData login path, ensuring that concurrent database updates for the same user fail when the original MFA token array has already been modified by another request.
### Workarounds
There is no known workaround.
OSV
Parse Server has an MFA single-use token bypass via concurrent authData login requests
osv·2026-03-29
CVE-2026-34224 [LOW] Parse Server has an MFA single-use token bypass via concurrent authData login requests
Parse Server has an MFA single-use token bypass via concurrent authData login requests
### Impact
An attacker who possesses a valid authentication provider token and a single MFA recovery code or SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions.
### Patches
The fix adds optimistic locking to the authData login path, ensuring that concurrent database updates for the same user fail when the original MFA token array has already been modified by another request.
### Workarounds
There is no known workaround.
No detection rules found.
No public exploits indexed.
https://github.com/parse-community/parse-server/commit/661f160edac8daac0486bc94413cf9652876ab92https://github.com/parse-community/parse-server/commit/e7efbebba398ce6abe5b6b6fb9829c6ebe310fbfhttps://github.com/parse-community/parse-server/pull/10326https://github.com/parse-community/parse-server/pull/10327https://github.com/parse-community/parse-server/security/advisories/GHSA-w73w-g5xw-rwhf
2026-03-31
Published