CVE-2026-121965 json
Parse Server before 8.6.113 and 9.10.6-alpha.5 Prototype Pollution via Dot Notation Key
published 5d ago modified 5d ago also EUVD-2026-116965
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
Parse Server before 8.6.113 and 9.0.0 before 9.10.6-alpha.5 contains a prototype pollution vulnerability when building objects for Cloud Code triggers and LiveQuery, where a dot notation key whose intermediate segment resolves through an inherited member writes onto a process-wide built-in. Clients with write access to an object in a class with a trigger or LiveQuery can corrupt a built-in function, making unrelated requests fail until restart and denying service to all clients and hosted applications.
Patch / fix
- parse-community parse-server 8.6.113, 9.10.6-alpha.5
- github.com/parse-community/parse-server#10810 pull request
- github.com/parse-community/parse-server#10811 pull request
Is CVE-2026-121965 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5d ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/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 |
Affected products
- parse-community parse-server
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
github.com
/parse-community/parse-server/pull/10810
patch, issue-tracking
-
github.com
/parse-community/parse-server/pull/10811
patch, issue-tracking
-
github.com
/parse-community/parse-server/security/advisories/GHSA-95hp-82c6-25q5
vendor-advisory
-
vulncheck.com
/advisories/parse-server-before-8.6.113-and-9.10.6-alpha.5-prototype-pollution-via-dot-notation-key
third-party-advisory
Sources
- CVE List CVE-2026-121965
- NVD CVE-2026-121965
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