Vulnerability details
CVE-2026-30965
parse-community parse-server
Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
CVSS 4.0
9.9Critical
Official description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.8 and 8.6.21, a vulnerability in Parse Server's query handling allows an authenticated or unauthenticated attacker to exfiltrate session tokens of other users by exploiting the redirectClassNameForKey query parameter. Exfiltrated session tokens can be used to take over user accounts. The vulnerability requires the attacker to be able to create or update an object with a new relation field, which depends on the Class-Level Permissions of at least one class. This vulnerability is fixed in 9.5.2-alpha.8 and 8.6.21.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.9Critical | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| parse-community | parse-server | < 8.6.21 | CVEProject cvelistV5 (CNA) |
| parse-community | parse-server | >= 9.0.0 < 9.5.2-alpha.8 | CVEProject cvelistV5 (CNA) |
References and advisories
3
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Details
- Published
- 2026-03-11
- Last updated
- 2026-03-11
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
1.45%
Probability of exploitation in 30 days
73.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-863Incorrect Authorization