CVE-2026-57480
CVE-2026-57480 — Parse Server: Denial of service via exponential-time processing of deeply nested query operators
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the internal query-traversal helper and block the Node.js event loop. This issue is fixed in versions 9.9.1-alpha.12 and 8.6.82.
Published Updated Sources: cvelistV5, GitHub_M
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
1%
chance of exploitation in 30 days
CVSS base
8.7
HIGH
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
Yes
can an attacker script all four kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 8.7 | CVSS 4.0 | HIGH | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-407
References
7 on the record
- github.com/parse-community/parse-server/security/advisories/GHSA-cgxm-vr2f-6fj8
x_refsource_CONFIRM
- github.com/parse-community/parse-server/pull/10511
x_refsource_MISC
- github.com/parse-community/parse-server/pull/10512
x_refsource_MISC
- github.com/parse-community/parse-server/commit/0f5d2ad77b422dc904458254548be87397fc6e9b
x_refsource_MISC
- github.com/parse-community/parse-server/commit/1103c7a890e0455ba3dccd4bc5db17efe1789c9a
x_refsource_MISC
- github.com/parse-community/parse-server/releases/tag/8.6.82
x_refsource_MISC
- github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.12
x_refsource_MISC
Elsewhere on this site
- parse communityevery CVE for this vendor
- CWE-407other pages naming this weakness
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.