CVE-2026-34595
Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value
At a glance
- Source
- NVD
- EPSS
- EPSS 0.26 % · percentile 18 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.70 and 9.7.0-alpha.18, an authenticated user with find class-level permission can bypass the protectedFields class-level permission setting on LiveQuery subscriptions. By sending a subscription with a $or, $and, or $nor operator value as a plain object with numeric keys and a length property (an "array-like" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value. This issue has been patched in versions 8.6.70 and 9.7.0-alpha.18.
Weaknesses (CWE)
- CWE-843 — Access of Resource Using Incompatible Type
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2
- https://github.com/parse-community/parse-server/pull/10350
- https://github.com/parse-community/parse-server/pull/10351
- https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98
- https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | MEDIUM 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | GitHub_M |
| CVSS 4.0 | MEDIUM 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/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 | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | MEDIUM 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-mmg8-87c5-jrc2 — Parse Server has a LiveQuery protected-field guard bypass via array-like logical operator value
European references
- ENISA EUVD · EUVD-2026-17504
- GCVE · GCVE-0-2026-34595
Affected configurations (NVD CPE)
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*< 8.6.70cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*≥ 9.0.0 < 9.7.0cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha1:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha10:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha11:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha12:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha13:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha14:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha15:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha2:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha3:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha4:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha5:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha6:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha7:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha8:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha9:*:*:*:node.js:*:*
Affected products
| Product | Versions |
|---|---|
| parse-community · parse-server | affected < 8.6.70 ; affected >= 9.0.0, < 9.7.0-alpha.18 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |